and if I rename the MP4 file to M4V it copies, but I get an error on my iPad that says it's not compatible. So basically this app doesn't copy videos to iPad. A waste of time and of 3 bucks.

I'm confused. You say that the app supports MP4, but when I try copy from my PC to my iPad2, it says videos must be MOV or M4V. Am I missing something?

iMovie for iPad will only recognize MP4 files.