That is awesome, I want one. At first I thought this was going to be the same as the one that Dan W posted about maybe a year ago (and which made the rounds on the internet, Rachel found it on a maker page), but this one is more impressive than that one in the end result.
Admittedly, I didn’t watch the whole thing yet, I’m not that handy, and so video of people using tools isn’t that interesting to me. I skipped to the end to see the final result. I did recognize the Uffington White Horse when he started up the computer, I’m not sure if that’s the logo of the company that did the programming installed on the computer, or if the maker of the Lego computer has some connection to it.