Hi, been training, researching, experimenting for over 25 years. Found this very interesting although very unconventional. Take the time to watch it even if you have been at this for years, it will go over ideas on diet as well as training and recovery. Not saying this is how I train or how anyone should train, just saying it is very interesting and actual science used in the explanation makes it even more interesting.
You can watch some of his training videos and others that utilize these methods by simply searching around. That is, if you still have interest after watching.
Much like trading there is more than one way to skin a cat. It all works. The real key is progression/progressive overload. If it's slow and methodical so be it. Stick to that tempo and progressively overload the muscle and get better with it over time. You can do this via volume, weight, reps etc. As far as science goes there are studies in the fitness world that prove and disprove the same theories. The key again is progress. I've studied, tested, researched, and analyzed many set/rep/intensity schemes and the differences between each weren't anything statistically significant to say one way is better than the other. I consider these four exercises staples however....Dips, chins, squats, and deadlifts, although as I said you don't 100% need these to obtain the physique/gain the strength you might be looking for however I just find those to be the most efficient/relative to real world activities. How many times in your lifetime have you picked something up off the ground? Proper deadlifting technique helps in many areas of life from a physical standpoint.
As far as diet goes from a macro view it's about energy balance, calories in vs. calories out. The only real difference in food selection comes in the form of micro nutrients (vitamins/minerals). You can eat 10,000 calories of bananas or 10,000 calories of cookies. You're still going to gain weight in both instances but at least you'll get some potassium eating those bananas lololol. If you want to feel better, look healthier etc eat more fruits and veggies. If you don't care too much about having your skin look better, have a more "natural energy" etc etc. you don't need to be paleo to get shredded or jacked.
P.S. my original profession was an Exercise Physiologist.