Here’s how you can play the classic Snake game on YouTube:
1. Open any video on the YouTube website
2. As it starts playing press the Pause button
3. Press and hold the Left Arrow key on your keyboard
The game ends if you hit the edge of the player or yourself. To restart the game press and hold the Left Arrow key again. I would suggest choosing a video with a black background (like this) as it is easier to see the snake and its prey on a darker background.
Note that the game only works on the new YouTube player (one with the horizontal volume bar) and only on YouTube’s website.