In support of this years Earth Hour happening the 27th of this month, the WWF has teamed up with Hot Chip and The Viral Factory to release an animation video that’s controlled by the light your webcam detects in your room. There are two storylines to this video—one dark and one light. Use the light switch on the top right hand corner of the video to jump between the two storylines.
Don’t have a cam, well, you can also toggle a fake virtual switch to see the difference.
Webcam controlled version: