Scott, I hadn't watched the entire video and I really don't wish to get into a long discussion about cueing skills and techniques but I do think you are a bit too critical of what is being said here.
I went back and viewed the portion where he speaks of follow through in regards to speed and spin, and though I agree with you that the length of time the cue tip is in contact with the cue ball is minimal regardless of the length of follow through, I think you will agree that follow through is one essential element to creating greater power and or spin. Stopping the cue tip in mid stroke reduces cue tip speed and requires more energy to do so. Inertia. He could have phrased it better.
The bottom line; in my opinion this is one of the better videos I've seen on this subject and it is worth studying by novice players looking to improve their cueing skills. That said, seeing a professional instructor is the way to go to get started properly.
Tom