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Looks like a MoYu Weilong stickerless cube. I think it can handle that speed without modifications.

Any 'legal' rotation is pretty easy on the insides, mechanically. You can adjust the tension and add some lube. It doesn't seem to do any corner-cutting in the slo-mo part of the video.

Oh, wow, this is solving a physical cube.

I guess this mimics human competition settings: you're allowed to examine the whole cube beforehand. Figuring out any valid solution is really trivial, esp. on a computer, it's just not hard.

Yeah, compare with this home made machine that solves a real rubiks cube https://m.youtube.com/watch?v=ixTddQQ2Hs4