This has been YouTube's biggest mystery for months: Weird videos - 80,000 of them - of red and blue blocks backed by odd electronic noises. What could they be?
Well, they weren't secret messages sent between spies, or beacons for extraterrestrial intelligences. They were merely tests.
The Webdriver Torso account started uploading videos to YouTube eight months ago at a pretty staggering rate -- as often as every two minutes at its peak. Every single one of them is 11 seconds long. Almost all of them are the same format.
One man went to great lengths to dig into the mystery, and came out the other end with a video that mocked the mystery - and provided the answer, with a Rickrolling video.
Turns out, YouTube was using the spontaneously-generated videos to test their uploading capabilities - and then the thing got out of hand.