There are a lot of other trainers out there, public ones, that don't get much mention here. By public ones, I mean ones that market their approach to the masses, either by selling dvd's or posting Youtube videos. (although, with regard to Youtube, the trainer isn't always the one posting the video. Oftentimes it's a client).
I have seen neat stuff by Julie Goodnight, Gorde Seale, Jonathon Field, Harry Whitney, Leslie Desmond, a guy named ---- Winters, u m m m m ..... even our own Ian Mcdonald. and a host of others. (there are many more but can't bring to mind right now)
My own trainer could stand easily amoungst this group. but she does not mass market herself, but chooses to work one on one only. From what I have seen of Clinton Anderson , he has not nearly the finesse of feel that many of these others have. But, he is loud, firm and self-confident, and that's what sells. And, he lays things out in a clear way that makes it easy to follow, as does Pat.
The Dorrance brothers worked as trainers for many years before they made any effort to try and share their knowledge with the "masses". IF they had been younger when the digital age reallly bloomed, I bet there would be more videos of them. But, maybe not, since they could not really impart what they knew unless they worked WITH a person. Showing it on video is a pale shadow of the reality of doing it face to face.
There is simply NO replacement for having someone teach you, face to face, hand to hand. Trainer's videos are helpful , and I think something can be learned from all of them, but nothing can teach the way real person and real experience can.