I bet that when they do this that older videos with newer thumbnails will get more clickthroughs and watch time same that of the newest uploads, but it won’t be as effective with documentary / science videos (vsause, veritasium ect) because their videos are highly memorable. This will have a bad effect on the end user filtering out low effort video farms that show up in the search results, because those videos tend to have 100 views - 10k views.
I bet that when they do this that older videos with newer thumbnails will get more clickthroughs and watch time same that of the newest uploads, but it won’t be as effective with documentary / science videos (vsause, veritasium ect) because their videos are highly memorable. This will have a bad effect on the end user filtering out low effort video farms that show up in the search results, because those videos tend to have 100 views - 10k views.