Many DVR and NVR systems (like Hikvision or Lorex) use numeric strings or timestamps as filenames.
Based on general file-naming conventions, here is what that file likely represents:
This player can open almost any .mp4 file even if the header is slightly corrupted.
If you are looking for a "review" of the technical quality of such a file:
MP4 is the universal standard. It works on almost all devices (iOS, Android, Windows, Mac).
Use a tool like MediaInfo to see when the file was created and what device recorded it.
If you have this file and aren't sure what is in it, you can check the following safely: