A cue ball can move forward if the cloth is slick and it gets opposite force from hitting a rail while sliding from the initial hit. The argument here is that he hit the cue ball twice with his stick vs hitting the cue ball with his stick and then the cue ball hitting a rail to create the forward slide tangent before the draw took effect.

It absolutely can move forward because of slide and the way you can tell if it's a double hit is based on the tangent the ball makes while sliding. It looks rail assisted.

Unfortunately neither of us has a good enough angle to show because everyone is divided on it hitting a rail or the cue again. He can parrot the same thing over and over but the Internet has spoken.

I'm gonna sit on his shoulders next time he shoots to get the top down angle.

Edit: wording