I like the way he stresses to look at where the aim line is pointed in reference to the 9ball. Don't just line up to the ghostball and then fire at that spot as soon as your practice parter moves it out of the way. Pay attention to where you're aiming on the ob, or in reference to the ob. This incorporates fractional or proportional type visuals that help with recognizing cb-ob relationships.
When he uses the planted tip at the estimated gb center, then rotates the cue so that it's over the cb, here's a good way to get a very good estimate without guessing so much....
Look down the shaft with the tip planted in line with the shot as he shows. If your ferrule is 1 inch, simple match that distance with the gap between your tip and the ball. In other words, from a standing perspective, look down at the shaft and adjust the tip position so that the amount/distance of cloth showing between the tip and the ball matches, visually, the length of the ferrule. This ends up being fairly accurate.
But then, once you get your cue in line over the cb, pay attention to where that aim line goes in reference to the ob itself, instead of some imaginary ghostball center or invisible spot on the cloth. By giving your mind a more concrete visual reference, like the actual ball you're aiming to hit, you'll develop good shot recognition much quicker.