The MOV file format is a common file extension compatible with both Windows and Mac operating systems and is designed by Apple, primarily for the QuickTime Movie Player. Of course, compressing a MOV file can help save storage space and make it easier to download and distribute the video file. If you want to make the file smaller, the MOV file has a Properties tab that will allow you to decrease the file size.
Locate the MOV file you want to make smaller.
Right-click the MOV file, and click "Properties."
Click the "General" tab, and click "Advanced."
Place a check mark in the box next to "Compress Contents to Save Disk Space."
Click "OK." Your MOV file will be saved to a smaller size.