Tout est parfait, I'm a mac os x user too! My preferred video player on os x is MPlayer. Get it at http://macupdate.com/info.php/id/10784 Once done right click (or ctrl click) on the video file and select "open with" --- MPlayer. To always have your video files open with MPlayer, do right click on the file, "get informations" and seclect the app you want to open the files and click on the button "modify all".

Ciao

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