Go to the chat from June 19, 2020 , and look through the shared media.
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. VID-20200619-WA0339mp4
Open your gallery or file manager and search for "WA0339." Go to the chat from June 19, 2020
Do you remember or what the conversation was about around that date? VID-20200619-WA0339mp4
: The date the video was saved or received (June 19, 2020).
If you use Google Photos or iCloud, search for that filename in your backup.