: The file extension, confirming it is an MPEG-4 video file. Video File Naming Convention & Best Practices

: Represents the date the file was handled by the application— September 15, 2022 —in the ISO 8601 (YYYYMMDD) format.

: A sequential number indicating this was the 12th video processed by WhatsApp on that specific day.

The string refers to a video file, most likely received or sent via WhatsApp , following a specific automated naming convention . Breakdown of the Filename