He's clearly doing a bit where he pretends to be confused and incompetent, and the punchline of the video is that he ends up with a working Windows CE port. He did a bit of soldering on the N64 board in the video so I think he probably does know what he's doing to a certain degree.

That said, LLMs have gotten extremely good at this kind of thing and you'd be shocked what you can do with this kind of low level work.

I suppose the repo is more telling than the video and shows some of the work put into it. The 'bit' he does in the video is jarring to me and makes me think of your typical crypto bro/AI bro/someone who may not know the inner workings of things, but the repo shows that isn't the case. I personally am not a fan of behavior like that for engagement/likes sake.