The flipped classroom is catching on and here are two tools to help cleanup any YouTube links you may wish to give to your students. This came about when Jerri Cheek was looking for a solution. The one found was http://www.viewpure.com. You copy and paste your link onto the website and it creates a new link without all of the various videos and advertisements shown on the common YouTube page. A new link is created you can share with your students.
Another alternative is http://www.nicertube.com. It does the same thing but does allow you to customize your background.