B4116.mp4 Today

It sounds like a specific local file name, a piece of "lost media," or perhaps a reference to a niche internet mystery (like a "creepypasta" or an ARG).

: What happens in the video? (e.g., Is it a security camera clip, a short animation, or a music video?) b4116.mp4

: Is there a specific mystery or story attached to it that you want me to highlight? It sounds like a specific local file name,