EF81 video problem

[ko4a]

I've got video problem with my phone. When i upload .mp4 files into it they doesn't play well is it a bug or this is a problem with the sofware i use ?
P.S now i use Imtoo converter and i used xilisoft converter before. There was the same problem with the xili! Also the video plays well 10 minutes and then starts bugging sry i don't know the word :lol:
come on help mee

[2GOOD]

Try with lower FPS for ecample 15-17.5 FPS and use .3gp file format if that is possible. I'm using this software called SUPER and I'm able to watch 40-45 min videos (no problem at all)

Good Luck