: Typically contains video (H.264/H.265) and audio (AAC), but can also hold subtitles and still images.

: Right-click the file and select "Open with" to use Windows Media Player or QuickTime.

Do you have on where you found this file or what you expect it to contain?

: MP4 files can contain metadata that may reveal where or when the video was created, though this can be easily edited.

Since the file extension is .mp4 , it is a digital multimedia container format. You can open it using: