I posted this issue to the forum: https://forums.adobe.com/message/10739124
No resolution. In sum, I upgraded my Mac OS and LR to most recent versions, but still can't seem to import select videos into the catalog on my upgraded mac mini, but can do so on my iMac. Makes NO sense whatsoever.
It says the following error, file contains no video frames: Dropbox - Screenshot 2018-11-12 18.01.55.png
BUT I can open the file using File Explorer/Finder and it is fine. Also, it imports fine on my other mac.
Here is the video. Can you try to see what happens on your end?
Dropbox - 313055685820259-record.mov
The file count is different on my iMac than my Mac Mini, for same folders. Makes no sense, but clearly my Mac Mini is not able to import all the files but my iMac can.
Any help is appreciated.
https://forums.adobe.com/message/10739124