at first i wanna thanks for your help..!
i previewing my .mov in timeline in a comp (hitting 0 from numpad or space bar makes that flick i told last time). but if i preview double clicking the .mov in the proyect panel it opens and playback correctly… the problem is with the video in a comp. i have set up the comp with the fps original video..
is a short video from videocopilot.net, but i tried with other videos and the same happens.