Add keyboard shortcuts to control HTML5 video playback rate. Available keyboard shortcuts are: <CTRL+[> = Decreate playback rate, <CTRL+]> = Increase playback rate, <CTRL+\> = Set playback rate increment/decrement unit, <CTRL+'> = Set playback to specific rate, <CTRL+;> Reset playback rate to default (to 1.0). Default playback rate incement/decrement is configurable via script.
This script is the same as https://greasyfork.org/en/scripts/32110-html5-video-playback-speed-control-keyboard-shortcut, but it has an added default speed setting.
License is kept the same and code is
