Changing the Thumbnail (poster frame) of a video in 2021
Ive looked around and Im not able to find out how to change the poster frame of a video anywhere. Im using iMovie and while there is a way to scroll through the video when exporting from iMovie there doesn't seem to be a way to set the poster frame as a few posts mentioned. Also there doesn't appear to be a way to do this is QuickTime anymore.
I do see that you can do this in photos, by clicking on the video and then edit. At the bottom on the timeline you can click another image and then on make key photo. Took me a while to figure this out.
But, would be nice to not have to import everything into photos then reexport it again. Also, this may have been a glitch, but I DID set the key frame and then it somehow reverted back once I shared it to a shared album.
Any this seems to be basic functionality in 2021, any ideas on what Im missing?
Thanks very much,