yep that is because of the so called GEMA .. as far as I know it is a company (here in germany) which got a deal with certain record labels and demands money from those who play their songs in public - e.g. radio stations, but also youtube.. as far as I know youtube was even willing to pay money per viewed video with GEMA audio content but they could not agree on a rate.. consequence: youtube blocks all affected videos in here so they (or the uploaders) won't get into trouble -.-