It works, but unfortunately, it's overzealous. When I try to change the audio track or automatically translate subtitles, the add-on won't let me. This limitation of functionality is a no-go for me.
Edit: Thanks for answer. If there is no way to know where the change came it is not fair to rate so low. Changed to four :)
The addon has no way of knowing if the change came from you or from YouTube. If you want, you can always disable the addon (it has a quick menu, see screenshots) and turn it on later
