I love how he uses his strength to create space and how he doesn't release the ball until it's almost touching the backboard. Both of those things help him score against bigger players. He's also good at reversing the ball.
Also, props to the officials for not calling a foul in that last sequence. A lot of players hit the deck, but there really wasn't much contact. No need to bail them out.
Agreed, but the upper body control and strength are also factors. He probably has good core strength, too.