If you found this file on your device or in a downloads folder, the alphanumeric string is likely a assigned by a specific service:
Do you have on where you found this file or what you expect it to contain? 0gwbjj8d23nft9mm1mi2x_source.mp4
Since the file extension is .mp4 , it is a digital multimedia container format. You can open it using: If you found this file on your device