Vid-20180107-wa0172.mp4

A sequential serial number assigned by the app for that specific day.

Because this is a private file name and not a public media title (like a movie or viral YouTube clip), I cannot see or "review" the video unless you describe its contents or upload it. VID: Indicates it is a video file. VID-20180107-WA0172.mp4

Short for WhatsApp , meaning the file was sent, received, or recorded through the app. A sequential serial number assigned by the app

If you can describe what happens in the video—such as the subject, the quality, or the context—I’d be happy to help you write a review or summarize it! meaning the file was sent

The date it was created or saved to the device (January 7, 2018).