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.
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
If you found this file unexpectedly, consider the following safety precautions: Converting video files to ASF or MP4 format - User guides
While there is no specific, widely recognized public record for a file named , its name follows common conventions used by professional security systems and high-end video equipment.
The "g" prefix followed by a four-digit number is a signature naming convention for video exports from security management platforms, most notably .
As an file, it uses the MPEG-4 Part 14 container format, which is universally compatible with modern devices.
You can typically open this file using VLC Media Player or standard OS video apps.
