Removes Youtube recommended videos in the sidebar and at the end of the video
2018 edition

https://gist.github.com/Antoine-dh/ca211b44781ce6111badab041d6b5baa

not compatible if your browser does not have ES6

May not work in some locales: either set youtube to English in the site's parameters or add the "Recommended for you" string of your language in the searchStrings array