Because WhatsApp strips original metadata (like GPS location or camera settings) to protect privacy and save space, the filename becomes the primary way to track its history.
If you were to look for this on a phone, it would typically be found in the WhatsApp/Media/WhatsApp Video/ folder. Why do people search for this? VID-20201122-WA0001.mp4
The numbers "20201122" indicate the file was created or saved on November 22, 2020 . Because WhatsApp strips original metadata (like GPS location
The "WA" in the filename confirms this video was received or sent through WhatsApp . VID-20201122-WA0001.mp4