Ok, so I can play the file through my iPhone when it resides on Google drive, but as soon as I sync it to my phone through iTunes it won't play it. So it must be the type of .MOV file that is causing the problem. The file is from a Canon 7D camera. I figured that since it is a .MOV file, and that the iPhone supports .MOV, that it would have no problem playing. But I guess there are different types of .MOV files, some of which are supported and some are not.

Hi, thanks for responding quickly. I checked the file and it doesn't have a space, just an underscore e.g. MVI_5035.MOV. Could that be the problem?