Do you mean Barry Cooper with KopBusters?

Formerly a police officer in Texas, Cooper is best known for KopBusters, a series of online videos in which he attempts to document police misconduct, and Never Get Busted Again, a series of videos aimed at teaching citizens how to evade false arrest by the police.

You probably meant this Video about it that went viral.

In Java Edition there is a bug mechanic called Quasi Connectivity, which allows you to power some redstone components from 2 blocks above, which normally wouldn’t work. This is because they just reused the door code for blocks that aren’t 2 blocks tall.

Here is a great explanation of it: https://www.youtube.com/watch?v=OJICW6BTJ74