Because this is a generic filename used for millions of private files, there isn't a single specific "post" or public video associated with it. These filenames are generated locally on a user's phone when they receive or save media.
If you are looking for a specific video that went viral or was posted to social media with this caption: VID-20221012-WA0078mp4
Do you have any so I can help you track it down? Because this is a generic filename used for