That's a very strange thing to happen.
What are the specs of this video? If you open it in Media Info, what is listed as its video codec?
What happens if you work in Expert view?
No idea what the specs are Steve. How would I open it in Media Info?
If I work in Expert view, it will let me place the .mov file in any audio or music track, but not video. Jing video: expert view placing mov file - mtnjim's library
I did follow tech supports advice of resetting the Nikon Coolpix S7000 digital camera that made the .mov files, and that does seem to have corrected the issue as the new video's I've recorded since resetting can be placed into PE14 projects. No idea what settings may have caused the issue, though....lol.
Thanks Steve. I found that I can also "Handbrake" the .mov files that didn't work into mp4 files and they will work!