I don't believe i missed this two years ago. This video must have caused some sensation back then.
Spoiler: the main character is walking backwards throughout the whole video. But the video is presented to us in reverse, so everyone else is walking backwards. Simple and neat. Here's the trailer:
I confess i didn't saw the whole 9 hours of this video. Yes, it's 9 hours of it... But i already caught some interesting moments. This is a good one for you to find out other great scenes in this video.
Here's the full version of the video.