If so, use VLCPLAYER's transcoding feature to encode them to something iTunes likes.
Remember that since I don't have access to your MP4s I can't pop the hood and see what's wrong.
I have itunes version 7, I also downloaded video converter (Isquint and visualhub). But still I can't play my mp4 videos in my itunes. I tried reinstalling it, still it doesn't work...
what should I do?