21

21 is the twenty-third video uploaded to the Let's 0 YouTube channel. It was uploaded on July 31, 2018 and is 7 seconds long.

Description
Why does it keep doing this?

Synopsis
A red light is seen in the darkness. Twice it chirps and briefly turns green. At one point, a flash of a brick wall with the graffiti "HIGHER POWER" written on it shows up.