: Shows the date the video was saved or created ( April 19, 2015 ). WA : Stands for WhatsApp.
The filename is a standard naming format used by WhatsApp for video files received or sent through the app . Based on the structure of the name: VID : Indicates the file is a Video.
Because this is a generic filename for a private media file, there is no public "detailed post" or specific content associated with it online. It is a private file likely stored on a specific phone or cloud backup from that date.