What kind of mp3 player? Does it have mp4 (video) listed as something it will play? You can go to the manufacturer's site and look up your device to find what it can play, and some of them, like Sansa, have a converter to use to make files work with their device.

This said, my Sony is supposed to play videos but it doesn't like most of the ones I've tried so far via my Win7 setup and using Windows Media Player. I have iTunes in the computer but haven't used it except to see how much some things might cost if I have to buy them because I can't find them at NetFlix or YouTube.

SRS