Those are some really interesting extensions you've suggested.

I'll be sure to keep Relay in the back of my mind, I haven't had need of it yet.

Though I do have requirement for SponsorBlock avid watcher of YT that I am, I am a little hesitant to add SponsorBlock as I am not quite sure how it would work flawlessly without some really complicated algorithms potentially involving ML work. I am curious to know if in your experience it has ever erred and automatically skipped portions it wasn't supposed to ? Or any other type of errors ?