SEACHANGE INTERNATIONAL INC
S-3, 1998-05-08
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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<PAGE>
 
      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 8, 1998

                                                      REGISTRATION NO. 333-_____
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                   ----------------------------------------

                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                   ----------------------------------------

                         SEACHANGE INTERNATIONAL, INC.
             (Exact name of Registrant as specified in its charter)

          DELAWARE                                          04-3197974
(State or other jurisdiction                             (I.R.S. Employer
of incorporation or organization)                      Identification Number)

                                124 ACTON STREET
                         MAYNARD, MASSACHUSETTS  01754
                                 (978) 897-0100
              (Address, including zip code, and telephone number,
       including area code, of Registrant's principal executive offices)

                   ----------------------------------------

                           WILLIAM C. STYSLINGER, III
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                124 ACTON STREET
                         MAYNARD, MASSACHUSETTS  01754
                                 (978) 897-0100
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                   ----------------------------------------

                                   COPIES TO:
                         WILLIAM B. SIMMONS, JR., ESQ.
                        Testa, Hurwitz & Thibeault, LLP
                       High Street Tower, 125 High Street
                          Boston, Massachusetts  02110
                                 (617) 248-7000

  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this registration statement becomes effective.
  If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [_]
  If any of the securities being registered on this form are to be offered on a
delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [X]
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act of 1933, please check the
following box and list the Securities Act registration number of the earlier
effective registration statement for the same offering. [_]
  If this Form is a post-effective amendment filed pursuant to Rule 462(c) under
the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
  If delivery of the prospectus is expected to be made pursuant to Rule 434
under the Securities Act of 1933, check the following box. [_]

                   ----------------------------------------

                        CALCULATION OF REGISTRATION FEE
<TABLE> 
<CAPTION> 
=========================================================================================================================
TITLE OF SHARES TO BE   AMOUNT TO BE    PROPOSED MAXIMUM OFFERING     PROPOSED MAXIMUM AGGREGATE   AMOUNT OF REGISTRATION
    REGISTERED           REGISTERED        PRICE PER SHARE(1)              OFFERING PRICE(1)               FEE(2)
- -------------------------------------------------------------------------------------------------------------------------
<S>                    <C>              <C>                           <C>                          <C>
Common Stock, $.01
par value              625,000 shares          $10.6875                       $6,679,687.50                $1,970.51
=========================================================================================================================
</TABLE>

(1) Estimated solely for purposes of calculating the registration fee pursuant
    to Rule 457 under the Securities Act of 1933.
(2) Pursuant to Rule 457(c) of the Securities Act of 1933, the registration fee
    has been calculated based upon the average of the high and low prices per
    share of Common Stock reported on the Nasdaq National Market on May 7, 1998.

                   ----------------------------------------

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
<PAGE>

***********************************************************************
*Information contained herein is subject to completion or amendment.  *
*A registration statement relating to these securities has been       *
*filed with the Securities and Exchange Commission. These securities  *
*may not be sold nor may offers to buy be accepted prior to the time  *
*the registration statement becomes effective. This prospectus shall  *
*not constitute an offer to sell or the solicitation of an offer to   *
*buy nor shall there be any sale of these securities in any state in  *
*which such offer, solicitation or sale would be unlawful prior to    *
*registration or qualification under the securities laws of any such  *
*state.                                                               *
***********************************************************************

                   SUBJECT TO COMPLETION, DATED MAY 8, 1998
 
                             ---------------------

                                   PROSPECTUS

                                 625,000 SHARES

                         SEACHANGE INTERNATIONAL, INC.

                                  COMMON STOCK

                             ---------------------

     This Prospectus relates to the sale of up to an aggregate of 625,000 shares
(the "Shares") of the common stock, par value $.01 per share (the "Common
Stock"), of SeaChange International, Inc., a Delaware corporation ("SeaChange"
or the "Company"), issued to the stockholders of SeaChange Asia Pacific
Operations Pte. Ltd., formerly IPC Interactive Pte. Ltd. ("SeaChange Asia") in
connection with the Company's acquisition of SeaChange Asia (collectively, the
"Selling Stockholders").  See "Selling Stockholders."  The Selling Stockholders
may sell the Shares from time to time at market prices prevailing at the time of
sale or at prices otherwise negotiated.  See "Plan of Distribution."  The
Selling Stockholders and certain persons who purchase shares from them including
broker-dealers acting as principals who may resell the Shares, may be deemed
"underwriters," as such term is defined in the Securities Act of 1933, as
amended (the "Securities Act").  See "Plan of Distribution."

     The Company will not receive any of the proceeds from the sale of the
Shares.  The Company is responsible for the expenses incurred in connection with
the registration of the Shares.  The Selling Stockholders will pay or assume
brokerage commissions or other similar charges incurred in the sale of the
Shares.  The Company has agreed to indemnify the Selling Stockholders against
certain liabilities, including liabilities under the Securities Act.

     The Company's Common Stock is listed on the Nasdaq National Market under
the symbol "SEAC".  The last reported sale price for the Common Stock on
May 7, 1998 was $10.375 per share, as reported by the Nasdaq National
Market.

                            _______________________

AN INVESTMENT IN THESE SECURITIES INVOLVES CERTAIN RISKS.  SEE "RISK FACTORS"
BEGINNING ON PAGE 5.

                            _______________________

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.

 
             The date of this Prospectus is ________________, 1998.
<PAGE>
 
                             AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports, proxy statements and other information with the
Securities and Exchange Commission (the "Commission").  Reports, proxy
statements and other information filed by the Company may be inspected and
copied at the public reference facilities maintained by the Commission at 450
Fifth Street, N.W., Washington, D.C. 20549 and at the Commission's regional
offices located at Seven World Trade Center, Suite 1300, New York, New York
10048, and at Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661.  Copies may also be obtained from the Public Reference Section
of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549 at
prescribed rates. The Commission also maintains a World Wide Web site that
contains reports, proxy and information statements and other information
regarding registrants that file electronically with the Commission at the
address "http://www.sec.gov."  The Common Stock of the Company is listed on the
Nasdaq National Market.  Reports, proxy statements and other information
concerning the Company may also be inspected at the offices of the National
Association of Securities Dealers, Inc. located at 1735 K Street, N.W.,
Washington, D.C. 20006.

     The Company has filed with the Commission a Registration Statement on Form
S-3 (including all amendments thereto, the "Registration Statement") under the
Securities Act, with respect to the Common Stock offered hereby.  This
Prospectus does not contain all information set forth in the Registration
Statement, certain parts of which are omitted in accordance with the rules and
regulations of the Commission.  For further information regarding the Company
and the Common Stock offered hereby, reference is hereby made to the
Registration Statement and to the exhibits and schedules filed therewith.
Statements contained in this Prospectus regarding the contents of any agreement
or other document filed as an exhibit to the Registration Statement are not
necessarily complete, and in each instance reference is made to the copy of such
document filed as an exhibit to the Registration Statement, each such statement
being qualified in all respects by such reference.  The Registration Statement,
including the exhibits and schedules thereto, may be inspected at the public
reference facilities maintained by the Commission at 450 Fifth Street, N.W.,
Washington, D.C. 20549 and copies of all or any part thereof may be obtained
from such office upon payment of the prescribed fees, and through its World Wide
Website (http:/www.sec.gov).

               INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

     The following documents filed by the Company with the Commission pursuant
to the Exchange Act (File No. 0-21393) are incorporated in this Prospectus by
reference, except as superseded or modified herein:

1.        The Company's Annual Report on Form 10-K for the fiscal year ended
          December 31, 1997.

2.        The Company's Current Report on Form 8-K/A filed February 23, 1998.

3.        The description of the Company's Common Stock contained in the
          Company's Registration Statement on Form 8-A filed pursuant to Section
          12(g) of the Exchange Act on September 18, 1996, including any
          amendment or report filed for the purpose of updating such
          description.

                                       2
<PAGE>
 
     All documents subsequently filed by the Company pursuant to Section 13(a),
13(c), 14 or 15(d) of the Exchange Act, prior to the termination of the offering
of the Shares, shall be deemed to be incorporated by reference in this
Prospectus and made a part hereof from the date of filing of such documents.
Any statement contained in a document incorporated or deemed to be incorporated
by reference in this Prospectus shall be deemed to be modified or superseded for
purposes of this Prospectus to the extent that a statement contained herein or
in any other subsequently filed document which is also deemed to be incorporated
by reference herein or in any prospectus supplement modifies or supersedes such
statement.  Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Prospectus.

     The Company will provide without charge to each person to whom a Prospectus
is delivered, on the written or oral request of any such person, a copy of any
or all of the documents incorporated by reference herein (other than exhibits to
such documents unless such exhibits are specifically incorporated by reference
into such documents).  Requests for such copies should be directed to Edward J.
McGrath, Acting Chief Financial Officer and Treasurer, at the principal
executive offices of the Company:  124 Acton Street, Maynard, Massachusetts
01754, telephone:  (978) 897-0100.  Unless the context otherwise requires,
references in this Prospectus to the "Company" or "SeaChange" refer to SeaChange
International, Inc. and its subsidiaries.

                                       3
<PAGE>
 
                                  THE COMPANY

     SeaChange provides products to digitally manage, store and distribute
digital video for television operators and telecommunications companies.  The
Company's products utilize its proprietary distributed application software and
standard industry components to automate the management and distribution of
video streams including advertisements, movies, news and other video programming
requiring precise, accurate and continuous execution.  The Company's digital
video products are designed to provide higher image quality and to be more
reliable, easier to use and less expensive than video tape-based systems.  In
addition, SeaChange's products enable its customers to increase revenues by
offering more targeted services such as geography-specific spot advertising and
video-on-demand movies.

     SeaChange's products address a number of specific markets.  The SeaChange
SPOT System is the leading digital advertisement insertion system for the
multichannel television market in terms of installations in the United States,
based on currently available industry sources and the Company's internal data.
The SeaChange SPOT System encodes analog video forms such as advertisements and
news, stores them in remote or local digital libraries, and inserts them
automatically into television network streams.  The SPOT System provides high
run-rate accuracy and video image quality, permits geographic and demographic
specificity of advertisements and reduces operating costs.  The Company also
sells two variants of this product-SPOT PRO which provides ad insertion
capability to small to mid-size television stations, and the SeaChange SPOT Long
Form System, a long-form video storage and delivery product for cable television
operators and telecommunications companies.  The Company also sells the
SeaChange Movie System, which provides long-form video storage and delivery for
the pay- per-view movie markets and the SeaChange GuestServe System for
delivering video- on-demand and other services to hotels.  The SeaChange
Advertising Management Software operates in conjunction with the SeaChange SPOT
System to automate and simplify complex sales, scheduling and billing processes
for the multichannel television market.  The Company also sells its Video Server
100, which is designed to store and distribute video streams of various lengths,
and MediaCluster, SeaChange's proprietary software technology that enables
multiple Video Server 100s to operate together as an integrated video server, to
systems integrators and value added resellers.  In addition, the Company is
developing its Broadcast MediaCluster systems for the broadcast television
industry for storage, archiving, on-air playback of advertising and other video
programming.  The Company is also developing its video-on-demand system to allow
cable television and other telecommunication companies to offer interactive
services to its subscribers.

     The Company was incorporated in Delaware in July 1993.  The Company's
principal executive offices are located at 124 Acton Street, Maynard,
Massachusetts 01754, and its telephone number is (978) 897-0100.

                                       4
<PAGE>
 
                                 RISK FACTORS

     In addition to the other information presented in this Prospectus and the
information incorporated in this Prospectus by reference, the following risk
factors should be considered carefully in evaluating the Company and its
business before purchasing the Common Stock offered hereby.  Certain statements
set forth in this Prospectus and the documents incorporated by reference herein
may constitute forward-looking statements within the meaning of the Private
Securities Litigation Reform Act of 1995.  Such statements are subject to risks
and uncertainties, and the Company's actual future results may differ materially
from those stated in any such forward-looking statements.  Factors that may
cause such differences include, but are not limited to, those described in the
following Risk Factors and in the other risk factors described from time to time
in the Company's filings with the Securities and Exchange Commission.


     LIMITED OPERATING HISTORY AND OPERATING RESULTS.

     The Company was founded in July 1993 and commenced shipment of its initial
products in the third quarter of 1994.  Accordingly, the Company has only a
limited operating history upon which an evaluation of the Company and its
prospects can be based. The Company's prospects must be considered in light of
the risks, expenses and difficulties frequently encountered by companies in
their early stage of development, particularly companies in new and rapidly
evolving markets. To address these risks, the Company must, among other things,
respond to competitive developments, continue to attract, retain and motivate
qualified persons, and continue to upgrade its technologies and commercialize
products and services incorporating such technologies. There can be no assurance
that the Company will be successful in addressing such risks. Increases in
operating expenses are expected to continue and may result in a decrease in
operating income.

     FLUCTUATIONS IN QUARTERLY OPERATING RESULTS.

     The Company's quarterly operating results have in the past varied and in
the future will be affected by factors such as: (i) the timing and recognition
of revenue from significant orders, (ii) the seasonality of the placement of
customer orders, (iii) the success of the Company's products, (iv) increased
competition, (v) changes in the Company's pricing policies or those of its
competitors, (vi) the financial stability of major customers, (vii) new product
introductions or enhancements by competitors, (viii) delays in the introduction
of products or product enhancements by the Company, (ix) customer order
deferrals in anticipation of upgrades and new products, (x) the ability to
access a sufficient supply of sole source and third party components, (xi) the
quality and market acceptance of new products, (xii) the timing and nature of
selling and marketing expenses (such as trade shows and other promotions),
(xiii) personnel changes, (xiv) the risks associated with international sales as
the Company expands its markets, (xv) the Company's ability to integrate the
operations of acquired subsidiaries and (xvi) economic conditions affecting the
Company's customers. Any significant cancellation or deferral of purchases of
the Company's products could have a material adverse effect on the Company's
business, financial condition and results of operations in any particular
quarter, and to the extent significant sales occur earlier than expected,
operating results for subsequent quarters may be adversely affected. The
Company's expense levels are based, in part, on its expectations as to future
revenues, and the Company may be unable to adjust spending in a timely manner to
compensate for any revenue shortfall. If revenues are below expectations,
operating results are likely to be adversely affected and net income may be
disproportionately affected because a significant portion of the Company's
expenses do not vary with revenues.

                                       5
<PAGE>
 
     Because of these factors, the Company believes that period-to-period
comparisons of its results of operations are not necessarily meaningful and
should not be relied upon as indications of future performance. Due to all of
the foregoing factors, in some future quarter the Company's operating results
may be below the expectations of public market analysts and investors.

     SEASONALITY.

     The Company's business has been seasonal with more orders being placed and
greater revenues being recognized in the first and second quarters than in the
third and fourth quarters. The Company believes that the concentration of order
placements in specific quarterly periods is due to customers' buying patterns
and budgeting cycles in the cable television industry. The Company anticipates
that these patterns will continue in the future. As a result, the Company's
results of operations have in the past and likely will in the future vary
seasonally in accordance with such purchasing activity. Due to the relatively
fixed nature of certain of the Company's costs throughout each quarterly period,
including personnel and facilities costs, the decline of revenues in any quarter
typically results in lower profitability in that quarter.

     MANAGEMENT OF GROWTH.

     The Company has experienced growth in revenues and expansion of its
operations which have placed significant demands on the Company's management,
administrative and operational resources. The Company believes that further
improvements in management and operational controls are needed, and would
continue to be needed to manage any future growth. Continued growth will also
require the Company to hire more technical, selling and marketing, support and
administrative personnel, expand manufacturing and customer service
capabilities, and update or expand management information systems. There can be
no assurance that the Company will be able to attract and retain the necessary
personnel to accomplish its growth strategies or that it will not experience
constraints that will adversely affect its ability to satisfy customer demand in
a timely fashion or to satisfactorily support its customers and operations.
Also, the Company may in the future acquire complementary service or product
lines, technologies or businesses, although the Company has no present
understandings, commitments or agreements with respect to any significant
acquisitions. If the Company's management is unable to manage growth effectively
or integrate any acquisition into the Company's operations successfully, the
Company's business, financial condition and results of operations could be
materially and adversely affected.

     PRODUCT CONCENTRATION.

     Through December 31, 1997, substantially all of the Company's revenues were
derived from the sale of the SeaChange SPOT System, movie systems and related
services. The Company's success depends in part on continued sales of the
SeaChange SPOT System, movie systems and the introduction of new products. A
decline in demand or average selling prices for the SeaChange SPOT System or
movie product lines, whether as a result of new product introductions by others,
price competition, technological change, inability to enhance the products in a
timely fashion, or otherwise, would have a material adverse effect on the
Company's business, financial condition and results of operations.

     HIGHLY COMPETITIVE MARKET.

     The market for digital video products is highly competitive. The Company
currently competes against suppliers of both analog tape-based and digital
systems in the advertisement insertion market and 

                                       6
<PAGE>
 
against both computer companies offering video server platforms and more
traditional movie application providers in the movie system market. When the
Company introduces products in the television broadcast market, the Company
expects to compete in that market against various computer companies offering
video server platforms and television equipment manufacturers. Due to the
rapidly evolving markets in which the Company competes, additional competitors
with significant market presence and financial resources, including computer
hardware and software companies and television equipment manufacturers, may
enter those markets, thereby further intensifying competition. Increased
competition could result in price reductions and loss of market share which
would adversely affect the Company's business, financial condition and results
of operations. Many of the Company's current and potential competitors have
greater financial, selling and marketing, technical and other resources than the
Company. Moreover, the Company's competitors may also foresee the course of
market developments more accurately than the Company. Although the Company
believes it has certain technological and other advantages over its competitors,
realizing and maintaining such advantages will require a continued high level of
investment by the Company in research and product development, marketing and
customer service and support. There can be no assurance that the Company will
have sufficient resources to continue to make such investments or that the
Company will be able to make the technological advances necessary to compete
successfully with its existing competitors or with new competitors.

     DEPENDENCE ON EMERGING DIGITAL VIDEO MARKET.

     Cable television operators and television broadcasters have historically
relied on traditional analog technology for video management, storage and
distribution. Digital video technology is still a relatively new technology and
requires a significant initial investment of capital. The Company's future
growth will depend both on the rate at which television operators convert to
digital video systems and the rate at which digital video technology expands to
additional market segments. There can be no assurance that the use of digital
video technology will expand among television operators or into additional
markets. Any failure by the market to accept digital video technology will have
a material adverse affect on the Company's business, financial condition and
results of operations.

     RISKS ASSOCIATED WITH EXPANSION INTO NEW MARKETS.

     To date, the Company's products have been purchased primarily by cable
television operators and telecommunications companies. The Company's success
depends in part on the penetration of new markets. In particular, the Company
plans to introduce several products for use by television broadcasters. These
broadcast products will be directed toward a market that the Company has not
previously addressed. There can be no assurance that the Company will be
successful in marketing and selling these new products to customers in the
broadcast television market. Any inability of the Company to penetrate this new
market would have a material adverse effect on the Company's business, financial
condition and results of operations.

     RISK OF NEW PRODUCT INTRODUCTIONS.

     The Company's future success requires that it develop and market additional
products that achieve significant market acceptance and enhance its current
products. The Company has recently introduced a new product which enables
television operators to provide video-on-demand and scheduled playback services
to hotels and apartments. The success of this product may depend in part on
relationships with movie content providers. There can be no assurance that the
Company will not experience difficulties that could delay or prevent the
successful development, introduction and marketing of this and other new
products and enhancements, or that its new products and enhancements 

                                       7
<PAGE>
 
will adequately meet the requirements of the marketplace and achieve market
acceptance. Announcements of currently planned or other new product offerings
may cause customers to defer purchasing existing Company products. Moreover,
there can be no assurance that, despite testing by the Company, and by current
and potential customers, errors or failures will not be found in the Company's
products, or, if discovered, successfully corrected in a timely manner. Such
errors or failures could cause delays in product introductions and shipments, or
require design modifications that could adversely affect the Company's
competitive position. The Company's inability to develop on a timely basis new
products, enhancements to existing products or error corrections, or the failure
of such new products or enhancements to achieve market acceptance could have a
material adverse effect on the Company's business, financial condition and
results of operations.

     RAPID TECHNOLOGICAL CHANGE.

     The markets for the Company's products are characterized by rapidly
changing technology, evolving industry standards and frequent new product
introductions and enhancements. Future technological advances in the television
and video industries may result in the availability of new products or services
that could compete with the solutions provided by the Company or reduce the cost
of existing products or services, any of which could enable the Company's
existing or potential customers to fulfill their video needs better and more
cost efficiently than with the Company's products. The Company's future success
will depend on its ability to enhance its existing digital video products,
including the development of new applications for its technology and to develop
and introduce new products to meet and adapt to changing customer requirements
and emerging technologies. There can be no assurance that the Company will be
successful in enhancing its digital video products or developing, manufacturing
and marketing new products which satisfy customer needs or achieve market
acceptance. In addition, there can be no assurance that services, products or
technologies developed by others will not render the Company's products or
technologies uncompetitive, unmarketable or obsolete, or that announcements of
currently planned or other new product offerings by either the Company or its
competitors will not cause customers to defer or fail to purchase existing
Company solutions. The failure of the Company to respond to rapidly changing
technologies related to digital video could have a material adverse effect on
the Company's business, financial condition and results of operations.

     SIGNIFICANT CONCENTRATION OF CUSTOMERS.

     The Company's customer base is highly concentrated among a limited number
of large customers, primarily due to the fact that the cable television and
telecommunications industries in the United States are dominated by a limited
number of large companies. A fairly limited number of customers account for a
significant percentage of the Company's revenues in any year.  In 1995, 1996 and
1997, revenues from the Company's five largest customers represented
approximately 91%, 76% and 68%, respectively, of the Company's total revenues.
In each of 1995 and 1996, four customers each accounted for more than 10% of the
Company's revenues and in 1997 three customers accounted for more than 10% of
the Company's revenues, two of which accounted for more than 10% of the
Company's revenues in 1995, 1996 and 1997. The Company generally does not have
written continuing purchase agreements with its customers and does not have any
written agreements that require customers to purchase fixed minimum quantities
of the Company's products. The Company's sales to specific customers tend to
vary significantly from year to year depending upon such customers' budgets for
capital expenditures and new product introductions. In addition, the Company
derives a substantial portion of its revenues from products that have a selling
price in excess of $150,000. The Company believes that revenue derived from
current and future large customers will continue to represent a significant
proportion of its total revenues. The loss of, or reduced demand for products or
related 

                                       8
<PAGE>
 
services from, any of the Company's major customers could have a material
adverse effect on the Company's business, financial condition and results of
operations.

     DEPENDENCE ON SOLE SOURCE SUPPLIERS AND THIRD PARTY MANUFACTURERS.

     Certain key components of the Company's products are currently purchased
from a sole supplier, including a computer chassis manufactured by Trimm
Technologic Inc., a disk controller manufactured by Mylex Corporation, an MPEG-2
decoder card manufactured by Vela Research, Inc. and an MPEG-2 encoder
manufactured by Optivision, Inc. The Company does not have material written
supply agreements with these or any of its suppliers. The Company has in the
past experienced quality control problems, where products did not meet
specifications or were damaged in shipping, and delays in the receipt of such
components. These problems were generally of short duration and did not have a
material adverse effect on the Company. However, the Company may in the future
experience similar types of problems which could be more severe or more
prolonged. The inability to obtain sufficient key components as required, or to
develop alternative sources if and as required in the future, could result in
delays or reductions in product shipments which, in turn, could have a material
adverse effect on the Company's business, financial condition and results of
operations. Moreover, the Company relies on a limited number of third parties
who manufacture certain components used in the Company's products. While to date
there has been suitable third party manufacturing capacity readily available at
acceptable quality levels, there can be no assurance that such manufacturers
will be able to meet the Company's future volume or quality requirements or that
such services will continue to be available to the Company at favorable prices.
Any financial, operational, production or quality assurance difficulties
experienced by such third party manufacturers that result in a reduction or
interruption in supply to the Company could have a material adverse effect on
the Company's business, financial condition and results of operations.

     REGULATION OF TELECOMMUNICATIONS AND TELEVISION INDUSTRIES.

     The telecommunications and television industries are subject to extensive
regulation in the United States and other countries. The Company's business is
dependent upon the continued growth of such industries in the United States and
internationally. Although recent legislation has lowered the legal barriers to
entry for telecommunications companies into the United States multichannel
television market, there can be no assurance that such telecommunications
companies will successfully enter this or related markets. Moreover, the growth
of the Company's business internationally is dependent in part on similar
deregulation of the telecommunications industry abroad and there can be no
assurance that such deregulation will occur. Television operators are also
subject to extensive government regulation by the Federal Communications
Commission (''FCC'') and other federal and state regulatory agencies. These
regulations could have the effect of limiting capital expenditures by television
operators and thus could have a material adverse effect on the Company's
business, financial condition and results of operations. The enactment by
federal, state or international governments of new laws or regulations, changes
in the interpretation of existing regulations or a reversal of the trend toward
deregulation in these industries could adversely affect the Company's customers,
and thereby materially adversely affect the Company's business, financial
condition and results of operations.

     LENGTHY SALES CYCLE.

     Digital video products are relatively complex and their purchase generally
involves a significant commitment of capital, with attendant delays frequently
associated with large capital expenditures and implementation procedures within
an organization. Moreover, the purchase of such products typically 

                                       9
<PAGE>
 
requires coordination and agreement among a potential customer's corporate
headquarters and its regional and local operations. For these and other reasons,
the sales cycle associated with the purchase of the Company's digital video
products is typically lengthy and subject to a number of significant risks,
including customers' budgetary constraints and internal acceptance reviews, over
which the Company has little or no control. Based upon all of the foregoing, the
Company believes that the Company's quarterly revenues, expenses and operating
results are likely to vary significantly in the future, that period-to-period
comparisons of its results of operations are not necessarily meaningful and
that, in any event, such comparisons should not be relied upon as indications of
future performance.

     DEPENDENCE ON KEY PERSONNEL AND HIRING OF ADDITIONAL PERSONNEL.

     The Company's success depends to a significant degree upon the continued
contributions of its key management, engineering, selling and marketing and
manufacturing personnel, many of whom would be difficult to replace. The Company
does not have employment contracts with its key personnel. The Company believes
its future success will also depend in large part upon its ability to attract
and retain highly skilled managerial, engineering, selling and marketing,
finance and manufacturing personnel. Competition for such personnel is intense,
and there can be no assurance that the Company will be successful in attracting
and retaining such personnel. The loss of the services of any of the key
personnel, the inability to attract or retain qualified personnel in the future
or delays in hiring required personnel, particularly software engineers and
sales personnel, could have a material adverse effect on the Company's business,
financial condition and results of operations.

     DEPENDENCE ON PROPRIETARY RIGHTS.

     The Company's success and its ability to compete is dependent, in part,
upon its proprietary rights. The Company relies primarily on a combination of
patent, copyright, trademark and trade secret laws, as well as confidentiality
procedures and contractual provisions to protect its proprietary rights. There
can be no assurance that such measures will be adequate to protect the Company's
proprietary rights. The Company attempts to ensure that its products and
technology do not infringe the proprietary rights of third parties. The Company
received a letter in January 1996 stating that the Company's video insertion
system may be utilizing technology patented by a third party. The Company did
not respond to such letter and has received no further communication from the
holder of these patents. The Company does not believe that its products infringe
the patents mentioned in such letter. However, there can be no assurance that
the holder of these patents or other third parties will not assert infringement
claims against the Company in the future or that any such claim will not be
successful.

     RISKS ASSOCIATED WITH INTERNATIONAL SALES.

     Prior to 1996, the Company derived no significant revenues from
international operations. International sales accounted for approximately 5% and
12% of the Company's total revenues in the years ended December 31, 1996, and
1997, respectively.  The Company expects that international sales will account
for a significant portion of the Company's business in the future. However,
there can be no assurance that the Company will be able to maintain or increase
international sales of its products. International sales are subject to a
variety of risks, including difficulties in establishing and managing
international distribution channels, in servicing and supporting overseas
products and in translating products into foreign languages. International
operations are subject to difficulties in collecting accounts receivable,
staffing and managing personnel and enforcing intellectual property rights.
Other factors that can also adversely affect international operations include
fluctuations in the value of foreign currencies 

                                       10
<PAGE>
 
and currency exchange rates, changes in import/export duties and quotas,
introduction of tariff or non-tariff barriers and economic or political changes
in international markets.

     CONCENTRATION OF OWNERSHIP.

     The Company's officers, directors and their affiliated entities, and other
holders of 5% or more of the Company's outstanding capital stock, together
beneficially owned approximately 64% of the outstanding shares of Common Stock
of the Company as of March 23, 1998. As a result, such persons will have the
ability to elect the Company's directors and to determine the outcome of
corporate actions requiring stockholder approval, irrespective of how other
stockholders of the Company may vote. This concentration of ownership may have
the effect of delaying or preventing a change in control of the Company which
may be favored by a majority of the remaining stockholders, or cause a change of
control not favored by the Company's other stockholders.

     INTEGRATION OF ACQUIRED BUSINESSES.

     The Company consummated its acquisition of SeaChange Asia in December 1997.
SeaChange Asia currently operates as a wholly-owned subsidiary of the Company.
The Company has limited experience in integrating acquired companies or
technologies into its operations.  The Company may from time to time pursue the
acquisition of other companies, assets, products or technologies.  There can be
no assurance that products, technologies, distribution channels, key personnel
and businesses of SeaChange Asia or any other acquired companies will be
successfully integrated into the Company's business or product offerings, or
that such integration will not adversely affect the Company's business,
financial condition or results of operations.  There can be no assurance that
any acquired companies, assets, products or technologies will contribute
significantly to the Company's sales or earnings, that the sales and earnings
from acquired businesses will not be adversely affected by the integration
process or other factors.  If the Company is not successful in the integration
of such acquired businesses, there could be an adverse impact on the financial
results of the Company.  There can be no assurance that the Company will
continue to be able to identify and consummate suitable acquisition transactions
in the future.

     POSSIBLE VOLATILITY OF STOCK PRICE.

     There has been significant volatility in the market price of securities of
high technology companies.  Factors such as announcements of technological
innovations by the Company, its competitors and other third parties, as well as
quarterly variations in the Company's results of operations and market
conditions in the industry, may cause the market price of the Company's Common
Stock to fluctuate significantly.  In addition, the public stock markets have
historically experienced extreme price and trading volume volatility.  This
volatility has significantly affected the market prices of securities of many
technology companies for reasons frequently unrelated to the operating
performance of the specific companies.  These broad market fluctuations may
adversely affect the market price of the Company's Common Stock.

                                       11
<PAGE>
 
                                USE OF PROCEEDS

     The Company will not receive any of the proceeds from the sale of the
Shares by the Selling Stockholders.  See "Selling Stockholders" and "Plan of
Distribution."  

                              SELLING STOCKHOLDERS

     The following table sets forth certain information regarding beneficial
ownership of the Shares and the number of shares as of April 30, 1998 which may
be offered for the account of the Selling Stockholders or their transferees,
distributees, pledgees, donees or other successors in interest from time to
time.  All of the shares offered hereby were acquired in connection with the
Company's acquisition of SeaChange Asia.  See "Plan of Distribution."

<TABLE>
<CAPTION>
                                   Number of Shares Beneficially      Number of Shares         Number of
                                               Owned                     to be Sold             Shares
                                       Prior to Offering (1)        in the Offering (2)   Beneficially Owned
      Selling Stockholders             Number        Percent (3)    Number   Percent (3)  After the Offering
- --------------------------------   -----------    --------------    -------  ----------   ------------------
<S>                                <C>            <C>               <C>      <C>          <C>
David Lampton                       156,187(4)          1.1         154,687      1.1             (5)
Johnathan Edwards                   154,687(6)          1.1         154,687      1.1             (5)
Philip Knudsen                        6,876(7)           *            3,126       *              (5)
IPC Corporation Ltd.                312,500(8)          2.3         312,500      2.3             (5)
</TABLE>
- -----------------
*Less than 1%

(1)  Except as otherwise indicated, the persons and entities named in the above
     table have sole voting and investment power with respect to all shares
     shown as beneficially owned by them.  Beneficial ownership is determined in
     accordance with the rules of the Commission, and includes voting and
     investment power with respect to shares.
(2)  Assumes that all of the Shares owned by each Selling Stockholder and
     offered pursuant to this Prospectus are sold during the distribution
     period.
(3)  As of April 30, 1998, there were 13,620,372 shares of Common Stock
     outstanding.
(4)  Includes 1,500 shares of Common Stock issuable upon the exercise of stock
     options, which options are exercisable within 60 days of April 30, 1998,
     and includes 134,268 Shares pledged by Mr. Lampton to Bear, Stearns
     Securities Corp. Also includes 20,419 Shares which are held in escrow
     pursuant to the terms of an Escrow Agreement dated December 10, 1997 by and
     among SeaChange, the Selling Stockholders and State Street Bank and Trust
     Company (the "Escrow Agreement").  Such shares may not be released from
     escrow and sold hereunder except in accordance with all terms and
     conditions of the Escrow Agreement.
(5)  Because the Selling Stockholders or their transferees, distributees,
     pledgees, donees or other successors in interest may sell all or any part
     of their Shares pursuant to this Prospectus, no estimate can be given as to
     the number of Shares that will be held by each Selling Stockholder upon
     termination of this offering.

                                       12
<PAGE>
 
(6)  Includes 20,419 Shares held in escrow pursuant to the terms of the Escrow
     Agreement.  Such Shares may not be released from escrow and sold hereunder
     except in accordance with all terms and conditions of the Escrow Agreement.
(7)  Includes 412 Shares held in escrow pursuant to the terms of the Escrow
     Agreement.  Such Shares may not be released from escrow and sold hereunder
     except in accordance with all terms and conditions of the Escrow Agreement.
     Also includes 3,750 shares of Common Stock issuable upon the exercise of
     stock options, which options are exercisable within 60 days of April 30,
     1998.
(8)  Includes 41,250 Shares held in escrow pursuant to the terms of the Escrow
     Agreement.  Such Shares may not be released from escrow and sold hereunder
     except in accordance with all terms and conditions of the Escrow Agreement.

     Since the acquisition of SeaChange Asia on December 10, 1997, Messrs.
     Knudsen and Lampton have been employees of GuestServe Networks, Inc., a
     wholly-owned subsidiary of the Company. Mr. Edwards is the president of a
     company which has provided consulting services to the Company since
     December 10, 1997. IPC Corporation Ltd. has not had a material relationship
     with the Company or any of its affiliates since the acquisition of
     SeaChange Asia on December 10, 1997.

                                       13
<PAGE>
 
                              PLAN OF DISTRIBUTION

     The Shares offered hereby may be sold from time to time by the Selling
Stockholders acting as principals for their own account.  The Company is
responsible for the expenses incurred in connection with the registration of the
Shares.  The Company will receive none of the proceeds from this offering.  The
Selling Stockholders will pay or assume brokerage commissions or other charges
and expenses incurred in the sale of the Shares.  In addition, the Company has
agreed to indemnify the Selling Stockholders against certain liabilities,
including liabilities under the Securities Act, and the Selling Stockholders
have agreed to indemnify the Company against certain liabilities, including
liabilities under the Securities Act.

     The distribution of the Shares by the Selling Stockholders is not currently
subject to any underwriting agreement.  The Shares covered by this Prospectus
may be sold by the Selling Stockholders or their transferees, distributees,
pledgees, donees, or other successors in interest from time to time.  Such sales
may be made at fixed prices that may be changed, at market prices prevailing at
the time of sale, at prices related to such prevailing market prices, or at
negotiated prices.  Such sales may be effected in the over-the-counter market,
on the National Association of Securities Dealers Automated Quotation System, on
the Nasdaq National Market, or on any exchange on which the Shares may then be
listed.  The Shares may be sold by one or more of the following:  (a) one or
more block trades in which a broker or dealer so engaged will attempt to sell
all or a portion of the Shares held by the Selling Stockholders as agent but may
position and resell a portion of the block as principal to facilitate the
transaction; (b) purchases by a broker or dealer as principal and resale by such
broker or dealer for its account pursuant to this Prospectus; (c) ordinary
brokerage transactions and transactions in which the broker solicits purchasers;
(d) in negotiated transactions; and (e) through other means.  The Selling
Stockholders may effect such transactions by selling Shares to or through
broker-dealers, and such broker-dealers will receive compensation in negotiated
amounts in the form of underwriting discounts, concessions, commissions or fees
from the Selling Stockholders and/or the purchasers of the Shares for whom such
broker-dealers may act as agent or to whom they sell as principal, or both
(which compensation to a particular broker-dealer might be in excess of
customary commissions).  Such brokers or dealers or the participating brokers or
dealers and the Selling Stockholders may be deemed to be "underwriters" within
the meaning of the Securities Act, in connection with such sales, and any
commissions received by such broker-dealers may be deemed to be underwriting
compensation.

     The Company has informed the Selling Stockholders that the antimanipulation
rules under the Securities Exchange Act of 1934 (including, without limitation,
Rule 10b-5 and Regulation M - Rule 102) may apply to sales in the market and
will furnish the Selling Stockholders upon request with a copy of these Rules.
The Company will also inform the Selling Stockholders of the need for delivery
of copies of this Prospectus.

     Any shares covered by the Prospectus that qualify for sale pursuant to Rule
144 under the Securities Act may be sold under Rule 144 rather than pursuant to
this Prospectus.

     The Company agreed to file a Registration Statement to register the resale
of the Shares and to use its reasonable efforts to maintain the effectiveness of
the Registration Statement until the earlier of (A) December 10, 1999, or (B)
the date on which no Shares originally held by the Selling Stockholders remain
unsold.

                                       14
<PAGE>
 
     The Selling Stockholders are not restricted as to the price or prices at
which they may sell their Shares.  Sales of such Shares at less than the market
prices may depress the market price of the Company's Common Stock.  During the
effective time of this Prospectus, the Selling Stockholders have agreed to
potential restrictions on resale if notified by the Company of a potential
material event that could have a material effect on the Company's business and
financial condition, for a period commencing upon such notice and ending upon
notice by the Company that such potential material event either has been
disclosed to the public or no longer constitutes a potential material event.
Notwithstanding the foregoing, the Company has agreed that the maximum aggregate
number of days during which the resale rights of the Selling Stockholders may be
suspended during the distribution period shall not exceed 60 days. The Selling
Stockholders are not restricted as to the number of Shares which may be sold at
any one time, and it is possible that a significant number of Shares could be
sold at the same time.

     ChaseMellon Shareholder Services, L.L.C., 111 Founders Plaza, Suite 1100,
East Hartford, Connecticut  06108 is the transfer agent for the Company's Common
Stock.

                                 LEGAL MATTERS

     Certain legal matters with respect to the issuance of the Shares are being
passed upon for the Company by Testa, Hurwitz & Thibeault, LLP, Boston,
Massachusetts.

                                    EXPERTS

     The consolidated financial statements and the Financial Statement Schedule
incorporated in this Prospectus by reference to the Annual Report on Form 10-K
for the year ended December 31, 1997, have been so incorporated in reliance on
the report of Price Waterhouse LLP, independent accountants, given on the
authority of said firm as experts in auditing and accounting.

                                       15
<PAGE>
 
- --------------------------------------------------------------------------------
No person has been authorized to give any information or to make any
representation other than those contained in this Prospectus and, if given or
made, such information or representation must not be relied upon as having been
authorized by the Company, any Selling Stockholder or any other person. This
Prospectus does not constitute an offer to sell or a solicitation of an offer in
any jurisdiction in which such offer or solicitation would be unlawful or to any
person to whom it is unlawful. Neither the delivery of this Prospectus nor any
sale made hereunder shall, under any circumstances, create an implication that
there has been no change in the affairs of the Company or that information
contained herein is correct as of any time subsequent to this date hereof.

                                  -----------
                                                                 
                               TABLE OF CONTENTS
                                                                            Page

Available Information.....................................................    2
Incorporation of Certain Information by Reference.........................    2
The Company...............................................................    4
Risk Factors..............................................................    5
Use of Proceeds...........................................................   12
Selling Stockholders......................................................   12
Plan of Distribution......................................................   14
Legal Matters.............................................................   15
Experts...................................................................   15

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

                                625,000 SHARES
                                                  
                         SEACHANGE INTERNATIONAL, INC.
                                                  
                                                  
                                 COMMON STOCK
                                                  


                                  ----------

                                  PROSPECTUS

                                  ----------




                                                  
                                _________, 1998
                                                  
                                                  
                                                  
- --------------------------------------------------------------------------------
<PAGE>
 
                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.


     Estimated expenses (other than underwriting discounts and commissions)
payable in connection with the sale of the Common Stock offered hereby are as
follows:


<TABLE>
<S>                                                      <C>
SEC Registration Fee                                     $ 1,970.51
Nasdaq Filing Fee                                         12,500.00
Legal fees and expenses                                   10,000.00
Accounting fees and expenses                               2,500.00
Miscellaneous                                              1,000.00
                                                         ----------
   Total                                                 $27,970.51
</TABLE>

     The Company will bear all expenses shown above.  All amounts other than the
SEC Registration Fee are estimated solely for the purpose of this offering.


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The Delaware General Corporation Law and the Company's Amended and Restated
Certificate of Incorporation (the "Charter") and Amended and Restated By-laws
(the "By-laws") provide for indemnification of the Company's directors and
officers for liabilities and expenses that they may incur in such capacities.
In general, directors and officers are indemnified with respect to actions taken
in good faith in a manner reasonably believed to be in, or not opposed to, the
best interests of the Company, and with respect to any criminal action or
proceeding, actions that the indemnitee had no reasonable cause to believe were
unlawful.  Reference is made to the Company's Charter and By-laws filed as
Exhibits 4.2 and 4.3 to the Company's Registration Statement on Form S-8 filed
on December 9, 1996 (No. 333-17379), respectively.


     The Underwriting Agreement executed in connection with the Company's
initial public offering provides that the Underwriters are obligated, under
certain circumstances, to indemnify directors, officers and controlling persons
of the Company against certain liabilities, including liabilities under the
Securities Act.  Reference is made to the form of Underwriting Agreement filed
as Exhibit 1.1 to the Company's Registration Statement on Form S-1 filed on
September 18, 1996 (File No. 333-12233).  In addition, certain Stockholders who
sold shares of Common Stock at the time of the Company's initial public offering
are parties to indemnification agreements with the Company whereby such
Stockholders have agreed, under certain circumstances, to indemnify directors,
officers and controlling persons of the Company against certain liabilities,
including liabilities under the Securities Act.


     In addition, the Registration Rights Agreement executed in connection with
the Company's acquisition of all of the outstanding capital stock of SeaChange
Asia provides that the Selling Stockholders are obligated, under certain
circumstances, to indemnify the Company and its directors and officers against
certain liabilities, including liabilities under the Securities Act.  Reference
is made to the Registration Rights Agreement filed as Exhibit 2.2 to the
Company's Current Report on Form 8-K dated December 10, 1997.

                                      II-1
<PAGE>
 
     The Company maintains director and officers liability insurance for the
benefit of its directors and certain of its officers.


ITEM 16.  EXHIBITS.


   4.1    Amended and Restated Certificate of Incorporation of the Company
          (filed as Exhibit 4.2 to the Company's Registration Statement on Form
          S-8 filed on December 9, 1996 (File No. 333-17379) and incorporated
          herein by reference)

   4.2    Amended and Restated By-laws of the Company (filed as Exhibit 4.3 to
          the Company's Registration Statement on Form S-8 filed on December 9,
          1996 (File No. 333-17379) and incorporated herein by reference)

   5.1*   Opinion of Testa, Hurwitz & Thibeault, LLP

   23.1*  Consent of Price Waterhouse LLP

   23.2*  Consent of Testa, Hurwitz & Thibeault, LLP (included in Exhibit 5.1)

   24.1*  Power of Attorney (included as part of the signature page to this
          Registration Statement)

- --------------
* Filed Herewith


ITEM 17.  UNDERTAKINGS.



The undersigned Registrant hereby undertakes:


(1)  To file, during any period in which offers or sales are being made, a post-
     effective amendment to this Registration Statement:

     (i)  to include any prospectus required by Section 10(a)(3) of the
          Securities Act of 1933;

     (ii) to reflect in the prospectus any facts or events arising after the
          effective date of this Registration Statement (or the most recent
          post-effective amendment thereof) which, individually or in the
          aggregate, represent a fundamental change in the information set forth
          in this Registration Statement.  Notwithstanding the foregoing, any
          increase or decrease in volume of securities offered (if the total
          dollar value of securities offered would not exceed that which was
          registered) and any deviation from the low or high and of the
          estimated maximum offering range may be reflected in the form of
          prospectus filed with the Commission pursuant to Rule 424(b) if, in
          the aggregate, the changes in volume and price represent no more than
          20 percent change in the maximum aggregate offering price set forth in
          the "Calculation of Registration Fee" table in the effective
          registration statement; and

     (iii)  to include any material information with respect to the plan of
            distribution not previously disclosed in the Registration Statement
            or any material change to such information in this Registration
            Statement.


(2)  That, for the purpose of determining any liability under the Securities Act
     of 1933, each such post-effective amendment shall be deemed to be a new
     registration statement relating to the securities offered therein, and the
     offering of such securities at that time shall be deemed to be the initial
     bona fide offering thereof.

                                      II-2
<PAGE>
 
(3)  To remove from registration by means of a post-effective amendment any of
     the securities being registered which remain unsold at the termination of
     the offering.

     The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 (and, where appropriate, each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the Registration Statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.


     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer, or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

     The undersigned registrant hereby undertakes that:

     (1) For purposes of determining any liability under the Securities Act of
     1933, the information omitted from the form of prospectus filed as part of
     this registration statement in reliance upon Rule 430A and contained in a
     form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or
     (4) or 497(h) under the Securities Act shall be deemed to be part of this
     registration statement as of the time it was declared effective.

     (2) For the purpose of determining any liability under the Securities Act
     of 1933, each post-effective amendment that contains a form of prospectus
     shall be deemed to be a new registration statement relating to the
     securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.

                                      II-3
<PAGE>
 
                                  SIGNATURES


Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
the requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Maynard and Commonwealth of Massachusetts on May 8,
1998.



                                    SEACHANGE INTERNATIONAL, INC.



                                    By:   /s/ William C. Styslinger, III
                                         -------------------------------
                                         William C. Styslinger, III
                                         President, Chief Executive Officer,
                                         Chairman of the Board and Director
 

                       POWER OF ATTORNEY AND SIGNATURES


We, the undersigned officers and directors of SeaChange International, Inc.,
hereby severally constitute and appoint William C. Styslinger, III and Edward J.
McGrath, and each of them singly, our true and lawful attorneys, with full power
to them and each of them singly, to sign for us in our names in the capacities
indicated below, all pre-effective and post-effective amendments to this
registration statement, any registration statement relating to this offering
that is to be effective upon filing pursuant to Rule 462(b) under the Securities
Act of 1933, as amended, and generally do all things in our names and on our
behalf in such capacities to enable SeaChange International, Inc. to comply with
the provisions of the Securities Act of 1933 and all requirements of the
Securities and Exchange Commission.

Pursuant to the requirements of the Securities Act of 1933, as amended, this
registration statement has been signed below by the following persons on behalf
of the Registrant and in the capacities and on the dates indicated.


<TABLE>
<CAPTION>
Signature                                                Title(s)                                   Date
- --------------------------------  ------------------------------------------------------     -------------------
<S>                               <C>                                                        <C>

/s/ William C. Styslinger, III     President, Chief Executive Officer, Chairman of the       May 8, 1998
- --------------------------------   Board and Director (Principal Executive Officer)
William C. Styslinger, III

/s/ Edward J. McGrath             Vice President, Engineering, Chief Technical Officer,      May 8, 1998
- --------------------------------  Secretary, Acting Chief Financial Officer and
Edward J. McGrath                 Treasurer, and Director (Principal Financial and
                                  Accounting Officer)
 
/s/ Martin R. Hoffmann            Director                                                   May 8, 1998
- --------------------------------
Martin R. Hoffmann

/s/ Paul H. Saunders              Director                                                   May 8, 1998
- --------------------------------
Paul H. Saunders

/s/ Carmine Vona                  Director                                                   May 8, 1998
- --------------------------------
Carmine Vona
</TABLE> 

                                      II-4
<PAGE>
 
                                 EXHIBIT INDEX

 Exhibit No.    Description of Exhibit
- --------------  ----------------------
   4.1          Amended and Restated Certificate of Incorporation of the Company
                (filed as Exhibit 4.2 to the Company's Registration Statement on
                Form S-8 filed on December 9, 1996 (File No. 333-17379) and
                incorporated herein by reference)

   4.2          Amended and Restated By-laws of the Company (filed as Exhibit
                4.3 to the Company's Registration Statement on Form S-8 filed on
                December 9, 1996 (File No. 333-17379) and incorporated herein by
                reference)

   5.1*         Opinion of Testa, Hurwitz & Thibeault, LLP

   23.1*        Consent of Price Waterhouse LLP

   23.2*        Consent of Testa, Hurwitz & Thibeault, LLP (included in Exhibit
                5.1)

   24.1*        Power of Attorney (included as part of the signature page to
                this Registration Statement)
- --------------
* Filed Herewith

<PAGE>
 
                                                                     Exhibit 5.1

                                    May 8, 1998


SeaChange International, Inc.
124 Acton Street
Maynard, Massachusetts  01754

     Re:  S-3 Registration Statement
          --------------------------

Ladies and Gentlemen:

     We are counsel to SeaChange International, Inc., a Delaware corporation
(the "Company"), and have represented the Company in connection with the
preparation and filing of the Company's Registration Statement on Form S-3 (the
"Registration Statement") under the Securities Act of 1933, as amended, covering
the sale to the public of an aggregate of 625,000 outstanding shares of the
Company's Common Stock, $.01 par value per share (the "Shares"), being sold by
certain stockholders of the Company.

     We have reviewed the corporate proceedings taken by the Board of Directors
of the Company with respect to the authorization and issuance of the Shares.  We
have also examined and relied upon originals or copies, certified or otherwise
authenticated to our satisfaction, of all corporate records, documents,
agreements or other instruments of the Company and have made all investigations
of law and have discussed with the Company's officers all questions of fact that
we have deemed necessary or appropriate.

     Based upon and subject to the foregoing, we are of the opinion that the
Shares are legally issued, fully paid and non-assessable.

     We hereby consent to the filing of this opinion as Exhibit 5.1 to the
Registration Statement and to the reference to our firm in the Prospectus
contained in the Registration Statement under the caption "Legal Matters."

                                    Very truly yours,

                                    /s/ Testa, Hurwitz & Thibeault, LLP

                                    TESTA, HURWITZ & THIBEAULT, LLP

<PAGE>
 
                                                                    Exhibit 23.1

                       CONSENT OF INDEPENDENT ACCOUNTANTS
                       ----------------------------------

We hereby consent to the incorporation by reference in the Prospectus
constituting part of this Registration Statement on Form S-3 of SeaChange
International, Inc. of our report dated January 22, 1998 appearing in the Annual
Report on Form 10-K for the year ended December 31, 1997.  We also consent to
the incorporation by reference of our report on the Financial Statement Schedule
included in such Annual Report.  We also consent to the reference to us under
the headings "Experts" in such Prospectus.


Price Waterhouse LLP
Boston, Massachusetts
May 7, 1998


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