Congrats, you baited me into watching the video again. Definitely a nazi salute. Twice. Crisp enough to identify as a nazi salute even if the context hadn't been a far-right industrialist celebrating a far-right victory. But that was the context, giving us two layers of unambiguity.
That's entirely because you have a bias that's set in your head that doesn't let you see anything else. You think he's a white supremacist so you see white supremacy.