Originally Posted by drjones

WMV will be a bit more efficient. but take it from me, macs are not good at playing WMV files. Windows Media 9 for mac OSX is officially unmaintained software from microsoft, any changes to the WMV codec do not get supported under mac osx. some WMV's play ok, some dont, seems to be about 50/50 for me.

As far as I know support that other 3rd party players for linux, and mac osx have for WMV have been reverse engineered since it is a proprietary codec. This generally means alot less reliability, shitty playback on these systems, bugs, and an overall shitty user experience even though you may get to view some of the videos. If you want total crossplatform playback use mpeg. I would try them both to see what is best for your business.