This is exactly the kind of video that make me fall down the YouTube hole and loose many, many minutes! It incorporates and icon of my childhood, the Game Boy and the tech side I always loved, the hardware, and the technical/developer side of things I do for work. All of it inside one great, quality animation video.
JackTech goes over the Game Boy and its CPU in great technical details with great explanation for the less technical viewer.
And there is a Part 1.5 video with some corrections if you are curious.