Most files with this name are mundane, but this specific string often resurfaces in "Y頭" (Y-style) or "WebM threads." Depending on where you find it, it usually refers to one of three things:

A snippet of a song or video that people are desperately trying to find the source of. The Digital Archeology

A video that starts quietly and ends with a loud noise and a frightening image.

Because these files are often deleted when threads expire, "1640301752098.webm" has become a bit of an . People post the filename as a "challenge" to see who can find the original clip or to trick new users into clicking a potentially unsettling link.

📍 The file is a snapshot of December 2021. Its "meaning" depends entirely on the community that shared it, turning a simple timestamp into a piece of digital folklore.

To help me narrow down exactly which version of this file you're looking for: Can you describe ? Where did you first see the filename ?