Good to see fitness stuff getting mentioned. His channel is pretty good. This guy is a PhD in relevant field and he has been working with professional athletes for years. Combination of his experience and theoretical background simply makes his channel invaluable. And I wonder if he has trouble washing out pen marks he draws on his body whenever he explains how muscle fibers look on his arm and how that's related with different forms and movement he designed -- well I mean most mark pens I used in my college stink like bad alcohol mixed with muddy paint so, good luck with washing that out :-p
Its' more of a bodyweight training focused fitness channel. Bodyweight training is arguably more difficult to progress (or unnatural? or inconsistent I would say? I mean you can't simply increment weight without changing your form like you can do when you progress with barbell/dumbell, you may have to adjust your form a little bit, can't think about right word for this) and yet more effective in training conditioning, mobility, skill (mainly because almost all bodyweight exercises involve more muscle groups/joints/body parts simultaneously, while, many weight training exercises using barbell/dumbbell as resistant instead of bodyweight, usually involve much fewer muscles joints and body parts) But not the case if we are talking about barbell trainings like squat and deadlift, these are as good as bodyweight training in terms of whole body involvement in my opinion. Actually I am doing bodyweight training for majority part of my body but squat and deadlift for my leg(dumbbell not barbell, well because I am too lazy to go to gym, I prefer exercising home, I would recommend using barbell though)
But with all those pros and cons of bodyweight training and non bodyweight trainng, both are good for your body, good to get you in shape and to look nice and to lose weight and to get stronger and all sort of things you can expect from arnold swarchenegger.
I like Jeremy Ethier much better, not only are his videos more dense, but they also tackle precise question with general applicability. They're also backed by solid science that is cited in the video, and feels less shaky than the "science" peddled by supplement vendors like Cavaliere or Jim Stoppani.
He's a great positive motivator. The content is very accessible and also all justified and explained throughly yet casually.
https://www.youtube.com/user/JDCav24