You can also play faster than the 2x speed limit cap using
document.getElementsByTagName("video")[0].playbackRate=4
is there a way to also make this the default max play speed without entering it in console?
I'm using https://github.com/codebicycle/videospeed
This extension adds keyboard shortcuts as well as a UI to all elements (YT and other sites). I have 'G' set playback rate to 2.2x.