Adds a button on Youtube videos to remove them from all playlists
While watching a Youtube video, you can single click remove it from any of your playlists that it is in.
The button is on the far right end of the Like/Dislike/Save/Etc bar (it looks like the "Save" to playlist button icon but with a minus instead of a plus).
(If the button doesn't show you can use the browser's page zoom in/out and it will appear.)