Literally, just about *any* other codec would work. I know for a fact that XVID encoded AVI's can play with VLC, a video player available for virtually every platform (
http://www.videolan.org/vlc/)
MPEG formats would also work well as they are supported by a variety of player applications. The problem with WMV3 is that it is only available when using windows media player, a program completely inaccessible to Linux users, and that has been discontinued for OSX.
As for your mac user friends, I would honestly like to know what software they used to play the clip. I've tried, and I can't do it, and apparently there are some other people here who agree with me. What are we doing wrong?
I don't mean to incite a flame war or anything similar over this- providing captured video is a great service to the community, and you should be congratulated for your find- just try not to leave some of us out in the dark.