G9640.mp4 -

A file named "g9640.mp4" is likely a proprietary surveillance clip that has been converted or exported to a standard format for viewing on standard Windows or mobile media players.

The "9640" part is typically a sequential ID assigned by the camera or the system during recording or export. Technical Properties of MP4 g9640.mp4

You can typically open this file using VLC Media Player or standard OS video apps. A file named "g9640

As an file, it uses the MPEG-4 Part 14 container format, which is universally compatible with modern devices. g9640.mp4

Even after conversion, the file may still contain EXIF data or internal atoms (like moof atoms) that provide forensic details about the camera model or recording time. Security Assessment