HIT is absolutely the best most intelligent way to train. There are caveats. First it takes many years of training to be able to recruit enough motor units to be able to actually fatigue a muscle in one whack. Second its extremely painful and absolutely wrecks your CNS. Third the only way it really works requires you to increase the workload every training session. This is tough. Even on a pretty big cycle adding even one or two reps or a pound or two to your bench every single week is almost impossible. It can be done, but not forever. And last some people have a genetic makeup that really favors HIT and some dont. I find it really easy to cause muscular damage and my body responds well to limited volume. Ronnie coleman literally had to destroy his body every couple days because of a genetic mutation that makes his muscles resistant to break down.
So, i think everyone who reads what i wrote most likely knows what i know already. Its a head scratcher why op thinks posting videos of obvious newbie trainers wasting time with HIT, as if we dont already know that without a sunstantial muscular base HIT wont work.