First of all, he’s moving his hands all over the place including to the rear during his load phase. His hands should not move during the load phase, and they absolutely should not move backward and down. The hand position at 31 seconds is proper, but at 35 seconds his hands are behind him and when his elbow drops to the slot it’s behind him setting up the bat to be very slow through the zone.
Another key to a successful load phase is getting weight shifted to the back side and keeping it there throughout the stride. Weight needs to not come forward before the bat