: A unique serial number for files saved on that specific day.
: Open your File Manager app and navigate to Internal Storage > Android > media > com.whatsapp > WhatsApp > Media > WhatsApp Video . Look for the file name ending in WA0013 . Download VID 20221021 WA0013 mp4
Because this is a private file name generated by a messaging app, there isn't a specific public "official" download link for it. If you are trying to find or save this video, here is how you can handle it: How to Find the Video on Your Device : A unique serial number for files saved