This study sought to assess the effects of a salt substitute (62.5% NaCl, 25% KCl, and 12.5% flavorings) on incidence of hypertension and hypotension among older adults with normal blood pressure.
https://www.sciencedirect.com/science/article/abs/pii/S0735109723082633?via%3Dihub
I suggest you watch that video again. He agrees that high sodium increases blood pressure. Most of his points are about how it affects people differently and other lifestyle factors that affect blood pressure such overall diet and exercise.
Yeah, but high sodium means you eat kilos of it every day. No one does that. NO ONE!