Many free stock video sites (like Pexels or Pixabay) export files with generic resolution-based names like vid_720p .
Tools used to download videos from platforms like TikTok, Instagram, or Twitter often rename files to a standardized format. vid_720p (6)mp4
If you have this file on your device and are trying to figure out what it is without opening it, you can check the : Many free stock video sites (like Pexels or