G60607.mp4 -

If your standard player won't open it, use VLC Media Player (Official Site). It is safe and can play almost any MP4 regardless of how it was encoded.

Since the filename itself is generic, you can use these methods to see what is inside without risking your device's security: g60607.mp4

Look at the file metadata in your File Explorer (Windows) or Finder (Mac). This will tell you exactly when the video was recorded or downloaded. If your standard player won't open it, use