A simple and lightweight script that adds an icon which allows the YouTube video player to fill the entire page, as a full browser player. This is especially useful for dual monitor users that may wish to continue working on other tasks with a large video playing.
In other words make your youtube fullscreen in your window!
FYI the shortcut key to toggle this without clicking is "T" on your keyboard!
Originally a chrome extension created by navi.jador . I have only converted this into a script