I do really like this... However, at the risk of messing things up, I'm actually using two separate "Enhancer" extensions at once, and the other one I like even better. Why then this? Because it's not perfect either, and I think they complement each others nicely. I use Enhancer for YouTube™ as my primary enhancer, I use it for theme, automatic video quality (separate for regular, fullscreen, popup and mini players), and automatic comment sorting, and to add some buttons under the video player - mostly. And then I use this mostly to add more buttons inside the video player. However, if the other one ever becomes unavailable (and it was for a while at one point), then I'll use this one for much more.

Anyway, both are awesome - and I thank you for making this, and even more for making it FOSS!! <3