The new version of the YouTube which automatically when starting a movie, displays with a sort of Dock Apple style, movies related to what you are watching (if you include a movie on your site).
It goes without saying that everything is weighed down and really turns out annoying, so much so that it has unleashed a shower of negative comments and there are few who appreciate it and find it useful.
On the official YouTube blog today it was communicated how to avoid the new bar and bring the player back to the way it was previously.
It is enough to add &rel=0 after the video url:
For example: https://youtube.com/v/dGAL2wWctII&rel=0