G371_001.mp4 -
VLC Media Player is often the best choice if you are having trouble with specific codecs.
Many DVR and NVR systems (like those from Lorex or Swann) use alphanumeric prefixes like "g" followed by a channel number and sequence to name exported clips. g371_001.mp4
Since it is an MP4 file , it is a standard digital multimedia container. You can open it with: Windows: Windows Media Player or Movies & TV . Mac: QuickTime Player . VLC Media Player is often the best choice
If this was found in a downloads folder or a shared drive, it may simply be an automated filename from a screen recording tool or a video converter that hadn't been manually renamed. You can open it with: Windows: Windows Media
Could you clarify ? Knowing if it's from a specific website, a security system, or an old hard drive would help identify its exact origin. How to play MP4 files in Windows - Microsoft Support
