You’ve just downloaded a video file, double-click it in excitement… and nothing happens. Or worse, it opens in a strange, mini-player with limited controls. Look at the file extension. Does it end with .playit ?
The name “playit” probably came from “play it now” — ironic, because without conversion, nothing plays it at all. Now you know the fix.
Enjoy your normal, boring, beautifully working MP4. 🎬