It differs from the traditional Judo version in a couple of ways. Instead of the traditional setup of getting your opponent to step forward and then "picking" the ankle (requiring perfect timing for the kozushi),
you give a pull on the lapel, step back with the lapel grip leg, change level, and "pick" his lapel grip side ankle with your other foot. Then you drive forward and power through chest to chest. Your non lapel grip hand drops to the outside of his hip thigh.
As he falls step wide with your lapel grip leg and secure a strong half guard top position.
You can see this takedown in action at 12 seconds in, again at 15 seconds in, and no-gi versions with an arm drag at 37 and 40 seconds in.
