Could be a screenshot of the new Missile Command, but it's the busy sky of Toronto!
higher resolution video on vimeo:
Shot during and after the Earth Hour on March 29th. Started from 6:49pm to 12:46am every 30 seconds.
Frames were imported into after effects and the highlights of each frame stays and is added to the next frame and so on; causing the trails for the planes, helicopters and stars to stay for the whole duration.