: The date the file was saved or sent (September 23, 2017). WA : Stands for WhatsApp.
Because this is a generic system-generated name for a personal media file, there is no public "write-up" or official documentation associated with it. To provide a helpful summary or description, I would Understanding the Filename : Indicates the file is a video. VID-20170923-WA0030
: Who sent the video, what conversation it was part of, and why it is being documented. Technical Details : The resolution and format (likely .mp4 ). : The date the file was saved or sent (September 23, 2017)
: A chronological description of what happens in the video (e.g., "0:05 - Subject enters the frame..."). what conversation it was part of
: File name, size, duration, and the date/time it was received.