...and it says that the type of video encoding we use is supported on Windows 8 mobile. On our full site, we use Flash and QuickTime "containers" because they help us protect the location of out video source files. However, our mobile site doesn't use Flash or QuickTime, so it should work in theory (though I haven't yet tried it myself). So try the mobile site at http://mobile.ballroomdancers.com/ and let me know if it works for you or not.
Regards, Jonathan Atkinson www.ballroomdancers.com