Exclamation mark in triangle on videos from iCloud- why won't they play?
I am trying to clear out my almost full iCloud, so I opened iCloud on my desktop and I'm trying to delete some videos. I'd like to watch some of these videos to decide if I should keep them, but... After letting it sit over night because it was taking to long to open the first video, I come back to find the yellow triangle with the exclamation mark in it over the video I was trying to open. After trying a few more, which were taken a while back by the way, they all seem to be out of commission. What is going on?
What's the use of having iCloud if you can't open the videos you've backed up?
Note: Coincidentally, my iMac needs an update to OS 11.4. It is running Big Sur v 11.2.3
Thanks! This is my first time using the Apple Community. I hope someone can help!
iMac 21.5″, macOS 11.2