G4_01263.mp4

: CCTV and NVR systems often generate filenames based on camera channels and timestamps.

: Some older or specific camera apps use similar alphanumeric strings for video exports. g4_01263.mp4

Do you have any on where this file came from, such as a specific brand of camera or a website link? : CCTV and NVR systems often generate filenames

This filename appears to be a default naming convention used by digital devices, such as: g4_01263.mp4

Since this name is likely unique to a private device or a specific local storage folder, I don't have access to its contents.