I dont really understand the MOV wrapper that quick time uses. So if I open a .mp4 - mpeg4 encoded file in quicktime, modify the file slightly, and save it as a self contained movie, then it saves as ...
You’re probably well aware that the Finder can preview QuickTime audio and video files—just click once on a QuickTime clip in column view mode, and you’ll see the movie appear in the Preview column, ...