From the Jigotai position, Dragin says to start pushing off of the right leg. Forcing your hip further into Uke and switching you weight onto your left leg.
This starts to lift the opponent up. It’s at this point that you want to step back with the right leg.
Notice how as he steps, Dragin sends it back towards his left leg, placing it just behind his left heel.
While stepping back with the right leg, you must begin to change the direction that your foot is facing, so that upon placing it down, it’s pointing forwards - in the throwing direction.
A small step back and pivot with the left foot as the right foot touches down, ensures both feet are now pointing forwards and in-line with each other, for the execution of the throw.
Throughout the step back, see how Dragin continues to pull on his partner’s lapel, and just as he repositions his feet he takes a grip on Uke’s upper arm with his left hand.
The angle at which Dragin is pulling on the lapel and how he grips the upper arm changes the position of Uke’s arm to that of a normal Seoi Nage. Their arm is almost wrapped around Dragin’s neck, with it being pulled down onto his trap muscle.
This really helps with the rotation to finish the throw.
To finish, Dragin says to continue pulling with the arms and then rotate your upper body, making sure that the rotation comes from the shoulders, and not his head.
In a more competitive scenario it looks like this: Once Dragin is comfortable on the lapel and has the distance, he sends his leg in, lifting his partner, taking hold of the arm and rotating. This sends his opponent over onto their back, for an emphatic Ippon.