Webdriver Torso

Webdriver Torso is a YouTube account that posts mostly 11-second videos consisting of blue and red rectangles accompanied by a set of monophonic tones. As of March 24, 2015, it has uploaded about 273 thousand videos, and about fifty thousand people have subscribed to the channel.
Nearly all the videos are eleven seconds long, but a small number last for 1:41 and some go on for twenty-five minutes.
Although the uploader is anonymous, there are said to be links with Google's Zurich offices.