The Scary Red Dot
From Screamer Wiki
The Scary Red Dot.mp4 is a screamer video. It is similar to Mysterious (SCARY) Dot because it pretends to be just a animation of a shrinking red dot, however after a time the dot disappears and at 0:19 a grayscale image of Regan appears along with a demonic scream.
The following video contains a screamer:
youtube.com/watch?v=U8OYbK5kWjI