Worked really well for all my Youtube needs. I downloaded it originally because I wanted night mode for youtube and couldn't get it otherwise, as I had missed out on my window for using the beta or whatever that Youtube was offering. I really also like the other features that are available, like setting a preferred playback quality, pinning the video when you scroll through comments, etc. Really useful extension overall! HOWEVER, I think that if the developer wanted to improve anything, they should really include changelogs with all updates they release. I think this would really improve the user experience since you'd actually be able to see what changes with each update. (the dev just released a sort of psuedo changelog with this last update where they asked for more reviews, and it was informative enough.)