Are you trying to this specific video, or did you see it mentioned in a specific online community ?
: The date the video was saved to the phone (April 19, 2015). VID-20150419-WA0140.mp4
: Short for WhatsApp, identifying the app that created the file. Are you trying to this specific video, or
Since this is likely a personal media file from 2015, you can try these steps to see what it contains: 2015). : Short for WhatsApp