These codecs have security issues, newer ones may be available, but if not connected to internet or disable/delete them before going online. They may help with other sierra games and games that use the codec

The game uses these codecs to play movies

Installation Notes for Windows 7 32bit might not work or use different commands on 64bit systems:

Read license, is ok? May offer newer codec
ivsetup.exe
Select custom install
then
Disable the web plug-in (It is the last checkbox).
and the other plugins besides 4.0 video and audio 2.5
The installer won't register the indeo codecs by default so,
as administrator from command prompt
regsvr32 ir50_32.dll (For Video might not be needed)

regsvr32 ir41_32.ax (For Video)
regsvr32 iac25_32.ax (for audio)

Uninstall

regsvr32 /u ir41_32.ax (For Video might not be needed)
regsvr32 /u iac25_32.ax (for audio)

On windows 7, you can look in
C:/Windows/System32
http://www.moviecodec.com/solutions/iv31-iv32-iv41-iv50-indeo-3-4-and-5-8211/
http://www.hubbywifey.com/2010/01/07/indeo-video-iv50-on-windows-7-fix/

Ineo Setup 5 release notes. (contains command line options)
http://www.siggraph.org/education/materials/HyperGraph/video/codecs/indeo_v5/releasenotes.htm

During installation you can also choose developer to be able to perform other tasks.