It was a good weekend for video codec reverse engineering. Kostya has worked out most of the details of Karl Morton’s Video Codec (KMVC) used in a series of games called “Worms”. He is close to a full implementation for FFmpeg. And Alex has been working on the VMware video codec.
Video decoding in KVMC is fine, it’s palette issues in one version that makes decoder incomplete (but it does not play right colors with original decoder under Windows too).
BTW, you can expand your statement a bit – weekends are good for reverse engineering.