IV50 (Indeo) was discontinued by MS some time ago. It's no longer included on newer OSs. The rights were bought by Ligos, but they haven't done anything with it either, AFAIK. The newer versions are payware.
You can try this freeware version, IV50 5.11 codec: http://www.free-codecs.com/download/Indeo_Codec.htm
I just drop the IV50's I come across into Any Video Converter and encode them into a more useful format.![]()