.mov is an Apple computer format, QuickTime, so Microsoft does not support it. I know the full version of Apple's QuickTime player will re-compress the video. You can download a free player from Apple. However, the best features require a code to be typed into the player to unlock all its features.

   You should check the software that came with your camera to see if it can re-compress.

   There may also be free programs to re-compress QuickTime. Are you using a Mac or a PC?

      Paul