Greasy Fork is available in English.
Increases the playback speed when the + key on the numpad is pressed, and decreases when the - key is pressed
< Spätná väzba na Youtube Speed Control With + and -
Apparently Chrome has a bug where, when firing a keyboard event, the keycode would always be zero. I managed to fix it (in v1.0.3).
doesn`t work anymore :-/
does not work for me anymore