The accept and reject button don't appear on such a video as far as I can tell

It annoys me because I am stuck with a pending action notification but can't do anything about it.

The verification process/buttons for obsolete runs should work exactly the same as other runs (non-obsolete). Can you maybe show a picture of how it looks for you?

I found it when I checked the … drop down text menu by the run. It just wasn't showing the Thumb up / Thumb down verify/reject buttons by default.

You can report that in the Feedback thread I guess. (it was a long time since I had a pending obsolete run)