Same here

Just saw this one yesterday on lemmy:

https://dearrow.ajay.app/

Removes clickbait thumbnails from YouTube and just pulls one from somewhere within the video.

Same creator as Sponsorblock, another must have for YouTube. Skips portions of the video that are basically spam, configurable to skip various parts.

https://sponsor.ajay.app/

And of course ublock origin for ad blocking, which also removes advertising in YouTube videos, at least for now.

https://ublockorigin.com/