I recently just got a new mp4 from China... it's a Unitbit X-813...
http://www.unibit.com.cn/eproducts_show.asp?id=187
And it says on that site that it supports avi and mpeg4 files, but when I put 'em on and try to play 'em, it goes, "error, unsupported format".
Audio files work fine, apart from video, nothing else has a problem.
Can anyone tell me what the hell wrong with this cheap chinese mp4?! -.-
And no, I'm not being racist. I'm Chinese myself. But chinese stuff is cheap and they suck.