Not Hatsune Miku and not Billy Herrington pole dancing during Nico Nico Douga's Vocaloid Night 2013.
KZ (Livetune) and other DJ's play Vocaloid-based sets, while a couple of game individuals entertain the crowd by throwing shapes in the church of dance.
Apologies for the crappy quality. It's ripped from Nico Nico's own live stream, and the full event was four hours long, so there's a lot of video compression going on here. :/