For years now the Universal Music Group (UMG) has been removing YouTube videos that match content licensed by them even if it falls under fair use. YouTube have given them the power to take down any video that takes their fancy, regardless of if it is copyright infringing or not, in a deal they made with them.
This is censorship of the highest degree and we must stand up and tell YouTube that we are for freedom of speech, expression, criticism, and that we will not stand idly by as they tear up our right of fair use.