Javascript script to run on any webpage having video element, and take control of the video speed.
copy main.min.js content to your clipboard
go to the webpage where video is playing type javascript: in the address bar and paste the script after colon(:).
open developer tools ctrl+shift+i or right-click + inspect element then go to console -> paste the script and hit enter.
this script will add a button Change Speed on the webpage, button visibility can be toggled by shift+q key bindings.
on button click dialog box will pop up and show the current speed and buttons to increase and decrease speed by 0.1
some webpages will rollback to their default speed because of video quality change, switch to fullscreen or normalscree, so this script will check for changes every 5sec and update the video element playback speed.