A great idea from Bloc Party:

For their music video to their single ‘Ares’ Bloc Party asked fans to send them their own video clips of the band performing live. These clips were then simply stitched together into a great music video, made for the fans by the fans. This is a great way to engage fans that makes great use of the material available thanks to the ease of video recording via mobile phones, and the ease that this material can be brought together through the power of the Internet.

via Trendplanner.