The "BOYS3.mp4" story is a popular internet creepypasta and urban legend centered around a supposedly "cursed" or disturbing video file. The core of the story usually follows this narrative:

: When played, the video typically features grainy, low-quality footage of a group of boys playing in a field or a basement. As the video progresses, the audio becomes distorted, and the visual quality decays into surreal, glitchy, or horrifying imagery.

: A user finds an old, unlabeled file named BOYS3.mp4 on a hard drive, an obscure file-sharing site, or a hidden directory on the deep web.