Letters on the Keyboard

Ben has been saying letters from the alphabet for several months.  He can say most of them in some form now.  He can also locate letters on the keyboard.  His toy laptop has a game where it shows a letter on the screen and he is supposed to press that letter on the keyboard.  Most of the time he gets it.  Sometimes he presses the wrong letter over and over on purpose.  This video is really dark, but I didn't want to turn on the living room light and spook him.  Getting a video of him playing this game or saying letters is like getting a photo of the Loch Ness monster.