As autistic person, I am not surprised. People hyperfocus on interests which scratch their itch (people with autism tend to be better at hyperfocus). A hyperfocus on gaming (specifically physical sports) fits in an autism profile, as does a hyperfocus on building a large (virtual) world. Keeping the build to yourself is akin to writing a book, not publishing it. In this case, the book is published.
If you will, he is manager/coach and player at the same time in Minecraft. Or, from a different PoV: IRL he is the coach, IVL he is the player (gamer).
Notice how his son did setup the A/V aspect of the recording, and how he is terrible with controller. PC gamer! I'm 40+ and would be terrible with either as well, CBA with it either.
Btw, I watched the video with my kids. They're aspiring Minecraft players, and enjoyed watching it -in awe- with me.
Mike Tyson is an extreme example. He dropped out of high school and probably never paid much of any attention for the schooling he did have. But listen to an interview with him, like on Rogan, and the man has a mind when you actually listen to what he's thinking/saying [1], as opposed to how he says it. And that's after decades of drugs and plenty of blows to the head.
Gymnasium was historically a place where you go not only for your physical but also your intellectual education, and I think the Greeks had it right. A strong mind needs a strong body, and vice versa.