@RAMification on the one defensive highlight, notice that david walls up the offender to get the block with both arms straight up in the air.
They don't normally teach that in aau or high school.
He's already knows how to play defense.
He also adroitly uses ball fakes in traffic. He "showed" the ball and got the defender to commit and went under or side stepped him for the easy 2.
Yup, david has been schooled well. If MR garners this kid's service then he won't have as much adjustment to college game as most freshmen