4horlover___bst297.mp4

This is likely a username, a "uploade" tag, or a community-specific prefix used on file-hosting sites.

When dealing with obscure file names found online, it is important to prioritize digital security: 4horlover___BST297.mp4

You can use ExifTool to view the internal metadata of the file, which may reveal the original creation date, the software used to encode it, or the actual title of the content. This is likely a username, a "uploade" tag,