G4_01103.mp4

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

Check the file size; a "feature" length video should typically be over 700MB. g4_01103.mp4

Many NVR/DVR security systems export clips with alphanumeric strings starting with "G" for specific camera groups. Take a screenshot of a unique frame and

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