Vid-20200619-wa0339mp4

Because this name is unique to the device it was saved on, only the sender or the person who has it in their WhatsApp "Sent" or "Media" folder knows what is inside.

Go to the chat from June 19, 2020 , and look through the shared media. VID-20200619-WA0339mp4

If you use Google Photos or iCloud, search for that filename in your backup. Because this name is unique to the device