Instead of this:

Your screen can look like this:

No distractions.

You do this by first calling up the video you want to watch, and then adding a DASH inside the address, between the t and the u in youtube.. For example, change
www.youtube.com/watch?v=uD2pUXUGsBE
to
www.yout-ube.com/watch?v=uD2pUXUGsBE

NOTE: This does NOT work with the shortened address you get when pressing the “Share” button. You have to copy/paste/modify the link at the top of the page, in the address bar.

This also MAY not work when monetization is enabled for the video. It throws an error message.