If the file doesn't have ".mp4" at the end, it may not open. You can manually rename the file to include the .mp4 extension.
Since this specific file is likely a personal or private recording, there is no public link to download it or a description of its specific content. However, here is how you can manage or identify the file: How to Find or Identify the Video Download VID 20440720 084443 139 mp4
Since it is an MP4 file, it is a universal format compatible with most players like VLC Media Player or Windows Media Player. Troubleshooting the Download If the file doesn't have "