I like this add-on, it has been working well for me. Although I mainly use it for the custom theme functionality and for removing annotations – for comprehensive ad-blocking I use µBlock Origin instead, so I cannot judge how well this add-on would do that.

As I cannot find another place or ticket system for a feature request, I'll do that here:

Please add an option to suppress Youtube's recent addition of the "Sign in to YouTube" dialog that has to be dismissed (by clicking "No thanks") every time the website is opened as a (non-logged-in) new user (meaning: no cookies present, like in private/incognito mode or with tracking protection). After the "Are you still there?" popup and the "Accept our new terms and gift us your soul" dialog, this "Sign in to YouTube" is now the third annoying dialog that interrupts or stalls video playback. Would be nice to have that option in Enhancer for YouTube™. :)