Jonathan Coulton’s “fans are so devoted, so involved and so technologically advanced that they create videos to his mostly folk rock songs and post them on YouTube. Coulton releases all his music under Creative Commons, a license that allows for the sharing of material. “It’s great to have someone say, ‘I love your songs,’ ” he says. “It’s even better to have them say, ‘Here’s a music video I made. I spent hours and hours putting this together.’ ”