Mike "Spiff" Booth began using World of Warcraft to create music videos for JoCo fans in May 2006. As of this writing, Spiff has created 13 videos. His video for Code Monkey has been viewed an astound 2,200,000 times, and Re Your Brains 1,500,000 times. Spiff's videos are responsible for many fans discovering the full Jonathan Coulton library.
See Spiff's website with the full video collection here.