Yesterday I was flying my Mavic Pro.  Took several stills and a few (3) video clips.  2 of the MP4 files look and play normally.  The 3rd one doesn't.  Not even with Quicktime or Premiere Pro.  The clips were taken consecutively, numbered consecutively, yet the time on the 3rd one is way off!

Not sure this will help but I found out that when creating a video I have to manually stop the record mode before powering down. Otherwise I get a corrupted file