The campaign of mass deletions has been orchestrated against Hatsune Miku and Vocaloid songs hosted on YouTube's various international sites, targeting translated versions.
Popular Vocaloid videos which were many years old and had accumulated millions of views have been deleted as a result of the action.
As the copyright for all original Hatsune Miku songs normally rests with the original creator, not with any company affiliated with Yamaha, Crypton or the record company mafia (except the minority of songs professionally published by these companies themselves), none of these deletions can be considered as anything but fraudulent.
YouTube has become the main place for the whole world to experience Vocaloid, and learn for it first hand. Crypton has officially acknowledged YouTube by basing MIKUBOOK, their social networking project, on YouTube as well as opening their own Miku channel.
Like normal Sankaku Complex goes on listing comments from the mega huge Japanese forum 2ch and many of them claim that it's Koreans requesting the take downs from a poll of Miku beating some Korean pop singer. Even though the ones making the game are using all sorts of fake names, my favorites list always gets eaten away by Youtube removing non-Miku Vocaloid videos.