PETA's Viral Problem

During thanksgiving PETA wanted to run their now widely known “Grace” commercial. It was not allowed on the airwaves but PETA posted it on their YouTube page, as did others. I stumbled upon a blog that had an embedded copy of the commercial posted by someone who was not PETA. When I went to click on the video I was met by the above message. This puzzled me. Clearly PETA wanted to get their message out, the whole point of going viral, yet only wanted people to view their copy. Wanting to monitor your content is still important but leaves a lingering question.