I think the parent's goal was to use the presence of a stupid thumbnail as proxy for low quality and completely hide those videos instead of merely replacing the thumbnail.
Now if there's also something that could detect "YouTuber voice" (https://www.vice.com/en/article/aepn94/the-rise-of-youtube-v...) or the awful trend of putting a short clip in the intro with no context which wastes your time at best or spoils the video at worst that would be great as well.
Now if there's also something that could detect "YouTuber voice" (https://www.vice.com/en/article/aepn94/the-rise-of-youtube-v...) or the awful trend of putting a short clip in the intro with no context which wastes your time at best or spoils the video at worst that would be great as well.