I have spent 2 1/2 hours on the phone with Microsoft Customer Support trying to find out what's wrong with my XBOX that it won't play any video files in the INternet Tv Beta portion of the Media Center on my XBOX and after close to 3 hours all they could come up with is must be my ISp and I don't have strong enough Internet service.Everything else plays fine no problems with Live or anything.I finally just hung up which is what they wanted me to do anyway. Hopefully someone can help some .Thanks Karl