I've been compiling a movie from videos I took on a recent vacation. Some have worked fine but one set, after two attempts to create the movie will not play.  All three sets I created contain both .avi and .mov files and two of them play fine. I've discovered that I can't seem to play any .mov files using windows media player (though two of my movie compilations have the same mix of .mov and .avi files and play fine). I could convert the .mov to .avi files before making the movie compilation but that will take some time, and given that the other two compilations with the same mix worked fine, I'm puzzled as to why this set won't work. I've reviewed all the videos in my compilation for the movie and they all play in that format. Anyone else having problems like this?