Brushing harder does NOT lead to better oral health.
Your gum tissue *and* the bone under them are what support your teeth and keep them connected to your jawbone. Pushing hard with your toothbrush leads to erosion of your tissues and creates recession. Improper technique negatively impacts the health of your gums.
Two minutes, twice each day, with just a fraction of the amount of toothpaste this guy is using, should do the trick.