: If you found this in your phone’s storage or a download folder, it is usually a video you viewed or saved from the app.
: If it was a partial download from a social media site, it may be a "chunk" of a larger video file that cannot be played on its own.
: Ensure it actually ends in .mp4 . If it is just 22700mp4 , try renaming it to 22700.mp4 .