Vid-20190924-wa0030mp4

Since the filename contains a date, you can narrow down what it might be by checking your digital history from :

: Use a file manager to navigate to Internal Storage > WhatsApp > Media > WhatsApp Video . iOS : Check the "WhatsApp" album in your Photos app. VID-20190924-WA0030mp4

If you have the file but cannot open it, or need to find where it is stored: Since the filename contains a date, you can