Hello Kristian,
I tried to refresh the tokens of both my accounts, but nothing changes.
I use Mac OS Catalina on a MacBook Pro and Ventura on an iMac Pro: both with the same problem.
Open the “Video Upload” window and upload a new video (or re-upload the current one). The current one is about to expire. Close the “Video Upload” window afterwards.
Give it some time to process the video. Once the video has been processed and is shown as “Live” create a new listing (just for testing purposes) and check if the option “Select eBay Video” is available now.