YouTube has a hidden easter egg that not many people know about, and it’s confined to the gaming category. To play a game of snake while watching a video, just “press the up and left arrows simultaneously.” Video demonstration after the break. If that doesn’t work, try this:
Just hit or hold down the left arrow; you have to be on the actual video page, not embedded or on the channel page; some say the clip has to be fully loaded, others say they can do it while it is loading.
[via Gizmodo]