Well, to answer your question....I'm sure you can easily find a few people on here that think I am a dumbass, and I learned it from the DVD.
I didn't "get it" right away. The reason I didn't, is because I kept adding in what I already knew about aiming. You can't do that. So I gave up on it. About a month or so later, after knowing others were "getting it", I revisted it. This time I payed attention, and it started to click. You have to empty your cup about aiming, and simply follow the directions as given. Do what the DVD tells you to do. Don't expect to suddenly become an aiming monster, but instead, just observe what happens.
For me, it clicked when I finally did the above stuff. And, yes, I have taught it to others that "got it".