The instructions are at the very end of the vid... but just to make it 100% clear:
2. When you get to the top of the key, let go of the right trigger. This leaves you enough momentum to trigger the move and also prevents you from accidentally holding the right trigger in the next step.
3. Right when you are about to run into the defender in the paint pull the left trigger and push the right stick to the ball side of your player. For example, if you are running down the right side of the paint and have the ball in your right hand you should press press towards the right side of the hoop (same side as the hang on rim jam).
2) (As shown in the youtube video) If you are on the right side with the ball in your right hand, Crawford will go behind his back twice very quickly. This animation isn't as flashy as the one that cuts across the paint, but it seems to be a 100% success rate.
Just remember to always push the right stick towards the ball side and one of the of the moves will trigger.

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