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.
If you found this file unexpectedly, consider the following safety precautions: Converting video files to ASF or MP4 format - User guides g9640.mp4
These systems typically record in proprietary formats like .g64 or .g64x to preserve metadata such as timestamps, motion indicators, and bookmarks. A file named "g9640
As an file, it uses the MPEG-4 Part 14 container format, which is universally compatible with modern devices. and bookmarks. As an file