Vid-20151207-wa0073 -

Because these files are private and stored locally on your device or in your personal cloud backups, I don't have access to the actual video content. It could be anything from a family holiday greeting to a funny clip shared in a group chat back in 2015.

: The date the video was saved or sent (December 7, 2015). WA : Indicates the file originated from WhatsApp.

: A unique serial number assigned to that specific file on that day.

Are you trying to this specific video from an old backup, or were you looking for a description of a viral video that might have been circulating under that name?