Suggestion: Option to Hide "Related Videos" so video can be wider

I like to play the video in a smaller browser window on my 2nd monitor. The problem is the “Related Video” panel takes up too much of the width and I’m left with a very small video. I’d like to see a small hyperlink or checkbox under settings gear (or at top of screen) that will allow me to hide the related windows. I need as much browser width as possible for the video.