I don’t know how possible that is anymore. Youtube is letting creators A/B test thumbnails and titles now. So the thumbnail and title isn’t consistent between users or page visits.

It’s tripped me up several times. Although it’s unclear how much it’s the new feature or creators manually trying to game the algorithm by shuffling the title and thumbnail around.

I believe it's consistent per user (account or logged out) while the test is ongoing then switches to the "winning" thumbnail for everyone once it concludes. Tests can be re-run as many times as you want though.