media_loop not 100% loop

Hi! I have looping video of talking character, which plays using media_loop. But, at the end of video, I always get little lag, which results in few frames being skipped, and so video does not looks like it is looping. Anyone had this problem as well? I probably know why it is so - after reaching end of file, video preloads in to the memory once again - but how to avoid this?