Vid-20211113-wa0077mp4 -

: While file names can be manually changed, these standard names are often used in digital forensics to suggest a video was shared via the app. WhatsApp media file naming convention - Forensic Focus

: A unique sequence number representing the 77th video file handled by WhatsApp on that specific day. VID-20211113-WA0077mp4

: The file extension indicating the video is in the MPEG-4 format, which is fully supported for sharing on WhatsApp . Key Characteristics : While file names can be manually changed,