A bit late to the party, but I've found a program on the ActImagine Video codec, and it seems to use an VXS1-encoded AVI file. However, I can't get it to play. I'm not sure if I'm allowed to upload the .avi videos in question that are encoded with this, but I'm going to look a bit more and see what else I can find. It might be the same codec used, but I'm not sure.
Edit: The VXS-1 codec was included in the ActImagine files, and I managed to install it as well.