This behavior can occur when running QuickTime version 7.6 or previous. The problem doesn't appear to happen on QuickTime version 7.7.6. However, since Apple has stopped supporting QuickTime on Windows they no longer have a link to download version 7.7.6.
- If the MOV is encoded in H.264 we can right click and rename the .mov file to .mp4. You may need to show file extensions in able to rename the extension. Then import the .mp4 and that will work.
- We can also convert the MOV file to MP4 using a free program called handbrake. We have a video on how to use Handbrake here.