Yup, too wristy. His swings are mostly arm and wrist flip. His hips follow the swing instead of lead. He would benefit from using more lower half earlier, thinking about driving the ball with his back hip, if that makes sense. He should think about meeting the ball out front while still maintaining the V angle with his bat and arms (as golfman said, palm up/palm down).
Also, when he loads, he drops his head and raises his front shoulder to the point that it looks like he is hiding his eyes from seeing the ball. Have him try a more natural stance at load where his head is more upright and comfortably looking at the ball.
He looks plenty athletic and certainly has potential. Lots can happen with him in the next year or two if he gets the baseball bug and decides to really work at it. It will probably also be a lot easier for him if he is not standing in two big holes
Best of luck.