Greasy Fork is available in English.
Select a youtube resolution and resize the player.
Thanks for the feedback. I would like the script to support the premium bitrate, but I do not have youtube premium myself right now so I cannot easily develop and test the feature. I will work to find someone to help me with that, but for the moment if it is not working for you, you may want to consider giving a try to some of the alternative scripts that seem to support the feature, such as: http://greasyfork.icu/en/scripts/498145-youtube-hd-premium
Thanks for a great script! Works perfectly.
Enhancement: Would be great to have support for "1080p Premium HD Enhanced bitrate" too :)
Thank you!