Beakman explains that a video game is a version of a computer. He goes over all of the computer components and then to show how this all works, they do a skit. In the skit, they have to give the exact program code to Lester (aka computer) to be able to do the action they want.
Meemaw gets Sheldon a new video game as a present, and Sheldon expresses that he's uninterested. Meemaw says she'll play by herself, and Sheldon out the juxtaposition that an old person (Meemaw) is using new technology.