What are YouTube screamers?

A screamer is a video or game that typically starts with asking you to stare at an image (usually challenging you to find the 'weird' part of the image) or complete a simple task (such as a maze that you complete with your mouse). After 30 seconds to a minute of you focusing on the video or game, a disturbing image will take the place of the video or game and a loud scream or noise will sound from the video or game.