Basically, Youtube isn't like Facebook or twitter, you can't post a message or anything on the "wall" of anybody else, just comments. There is no aggregating feed. Because it's a publicizing tool. The one owning the account has full control on its "channel", where are posted his "likes" (called differently on youtube), what he adds to his favourites, and his created videos. So unless we get in touch with the owner, that has only been reposting old videos of the official ParagonStudios/City Of Heroes channel (which is generally considered stealing on Youtube), we can't exploit that.
Better create a new account, and why not named shorter, like SaveCOH (like thetwitter feed and the bit.ly petition link)