Notice how close he is keeping his arm to his body and notice how far the bell swings out (not far)
If you are using one bell and smashing your wrist, then it could be several things.
1. You could be letting the bell get too far out on the clean. So, when you try to bring it to the rack it ends up flipping over and smashing you on the wrist or forearm instead of landing between the bicep and forearm.
2. You may not be punching up at the right time to get the right landing.
3. It could be the design of the KB you are using in relation to the size of your hand and wrist.