G371_001.mp4 -

If this was found in a downloads folder or a shared drive, it may simply be an automated filename from a screen recording tool or a video converter that hadn't been manually renamed.

"g371_001.mp4" appears to be a specific file name rather than a widely recognized piece of media or a viral internet phenomenon. In a general context, it follows a standard often used by digital cameras, security systems, or video editing software. g371_001.mp4

Many DVR and NVR systems (like those from Lorex or Swann) use alphanumeric prefixes like "g" followed by a channel number and sequence to name exported clips. If this was found in a downloads folder