Other than a slightly high back arch I would say his lifts are good. Damn strong kid.
I am 6'2 at age 20 the best I could do was around 350. My best aver was 445 for a single at #225's. My lift style was not to far from his. the crab position is what most call it, the drive position. 3 points, ass shoulders, press up press hard.
I only hope he goes easy on his shoulders. I paid the price once I hit my 30's.
I've since opted for a more bodybuilder approach and more flat back presses. More reps and sets, less weight yet working up the progressive overload ladder.
I am 37 years old now and can feel muscle growing, nice feeling.