This amazing video of what appears to be a minature New York City was shot and edited by Sam O'Hare. This is actually time-lapse photography shot in New York in August 2009. The miniature look was created by applying a tilt-shift effect in post-production.
katamaran78 re-created the Beastie Boy's (wikipedia) Sabotage video shot-for-shot using video from Galactica. The second video shows a side by side comparision between katamaran78's video and the original video.
Hudson-Powell & Joel Gethin Lewis created software that takes a video image and replaces people's heads with cartoon heads if they are holding a special card. Watch the software in action in this video.