Which means it was removed because of copyright.
YouTube NEVER wants to admit anymore that the companies have the videos taken down for copyright, so instead, they put in its place, "Removed by the user"; trust me, I've gotten in trouble with Lionsgate, Disney, Fox, Bagdasarian Productions, among others for copyright, and whenever you click the links to those videos, they all say, "Removed by the user", when they were deleted by whoever filed the copyright complaint.