G4_01103.mp4 -

Many NVR/DVR security systems export clips with alphanumeric strings starting with "G" for specific camera groups.

Use ExifTool to find the creation date and device model. g4_01103.mp4

Are you trying to this specific file, or did you find it in a system folder ? Many NVR/DVR security systems export clips with alphanumeric

If you have the file and want to know what it is without opening it: g4_01103.mp4

Check the file size; a "feature" length video should typically be over 700MB.

Take a screenshot of a unique frame and upload it to Google Lens or TinEye .