iMovie imports no longer working for Photos or iCloud videos
I am using iMovie on my MacBook Pro (purch. July 2020) and shooting video with my iPhone XS. I have made several projects in iMovie so far, and all of a sudden, my videos no longer import. They show up in iMovie my media as black thumbnails with audio w/no visual, or thumbnails that play for less than 4 seconds. What happened? How can I fix this? My several longer projects With many videos imported all video just fine. I was downloading videos from my Google Drive to my MacBook, then uploading them until that stopped working and had to convert each file from .mov to mp4, (took hours) and now nothing works. Dragging videos from iCloud or Photos was working for a couple projects, now not at all. Even videos I shot this afternoon on iPhone aren’t showing up in iCloud or Photos, but are visible on my phone. Any help would be appreciated!