While the naming convention is legitimate, you should exercise caution before downloading or opening such files from unknown sources:

: A unique four-digit sequence number assigned by the app to differentiate it from other media received on the same day.

: The digital multimedia container format used to store the video and audio. Is it Safe to Download?

: If you must download it, use antivirus software or tools like VirusTotal to check for potential threats before opening it. How to Name Your Files (Easy 3-Step Formula)

: Only download files from contacts you trust. Malicious actors often use common file names to trick users into downloading malware or spyware .