You have no idea how much I've wanted an addon like this. Sure, the non-clickbait custom thumbnails might be gone, but that's a small price to pay for getting rid of "Boobies in Thumbnail CLICC NOW" thumbnails that plauge YouTube.

very very good,thank you

Small change to YouTube's UX is a bit improvement.

Indispensable para todo aquel que use YouTube habitualmente. ¡Gracias al desarrollador por esta extensión!

Works perfectly 👍
2 Things that would be cool to add are...
-When you move your mouse over the thumbnail, it shows images from the beginning, middle, and end of the video.
-The ability to view the original thumbnail when...^