I got that same problem. but i somehow found out about this really great free program called BLINK. itll convert your videos for you. and its really easy to install and use.

http://radgametools.com/

once you download it and install it,, get rid of the icons it puts on your desktop. cuz those dont do crap. and open it up from inside your Start menu. once you have it open,, find the video you want to convert,, and press on "Convert" and then press "Convert" again on the second window.. and vala!!