Help with Yuukified Poutine Bucket

Hey everyone. I am trying to learn Yuukified Poutine Bucket.

Can anyone explain what wrist motion you have to do to get the slack to whip around your wrist twice? I cant figure it out. Or maybe upload a tutorial?

Thanks guys!

Notice how right before he spins the slack around, his throwhand pointer with all the strings wrapped around it is turned up. Then, with his nonthrowhand, he throws the slack, but also twists his throwhand to give it torque to make it’s way around. Both the throwing and twisting of the throwhand are what allow it to get around.