I skimmed the video because this is obviously very childish not really worth half an hour of my time.

That being said, I did not see him perform any kind of rigorous numerical or theoretical analysis of the problem, which would be the first thing an actual engineer would reach for. No finite element simulations, not even empirical napkin math: nothing. He didn't even analyze pi groups involved in the problem to prove similarity between his scale model and an actual functioning hyperloop. The end result is a for-your-entertainment-only youtube prop that has no bearing on the performance and reliability of the actual functioning model.