At the 2:15 mark, the audio cuts to a sharp, rhythmic scratching sound. A figure—blurred and seemingly missing facial features—appears at the far end of the hallway, moving toward the camera in a stuttering, frame-skipping motion.
In truth, b663.mp4 is a work of and an ARG (Alternate Reality Game) project. It was designed to play on the "uncanny valley" of early digital video compression. The coordinates and "stalking" elements were clever scripts intended to spook tech-savvy teenagers on 4chan and Reddit. b663.mp4
The file first gained notoriety on obscure file-sharing mirrors and deep-web forums in the early 2010s. Unlike typical viral videos, b663.mp4 was never hosted on mainstream platforms for long; it was frequently flagged and removed for "disturbing content," though the nature of that content was never explicitly illegal—just deeply "wrong." The Content At the 2:15 mark, the audio cuts to
The "proper" story of b663.mp4 isn't just about the video itself, but what happens to the computer that hosts it. According to the lore: It was designed to play on the "uncanny