As far as Firefox goes, this is an excellent user script. 5 stars!

Unfortunately, it doesn't work at all in my primary browser, Opera. I won't retract points for that, as most user scripts are designed to work with Greasemonkey and/or Stylish and don't take Opera's native user script capabilities in mind. I do suggest you look into it, though. There are many Opera users that would be very glad to not need the terrible Flash plugin to watch YouTube videos.

Perfect! Just want I need. Flash sucks, jk.

Works as it's supposed to. Finally can watch YT in full screen. Happyness.

Only thing I'd wish for was loading the youtube srt subtitles into the video.

By default the script disables flash. I can't see any preferences. Ideally it would be nice to control the options. Either way, the links make it trivial to download videos directly from YouTube. I'm very grateful to the script's author.

Da quando i plugin di Totem non sono più in grado di accedere ai video di Youtube questo script si rivela essere il sostituto ideale.

Si fa apprezzare per la semplicità d'uso, il buon funzionamento e l'integrazione perfetta con il portale.

Ora è stato aggiunto anche il supporto ad Epiphany-browser, mostrando una marcia in più rispetto a script che svolgono un lavoro simile.

La soluzione migliore per Youtube!
Complimenti all'autore!