Your foot placement has nothing to do with the camera. It is off. It is off regardless of what direction and which leg you step with. You are doing it the way Cheng taught, and you are loosing so much energy generation because of it.
It doesnt matter if you learn from another teacher, you do not add to the the way they taught to the form.
Sure, there is a lean, but again, it isnt correct.
I think I'm going to stick with Cheng's way of doing it. Even if the man ONLY studied with Yang Chen Fu for 6 months I'm going to put him and his opinions way above someone from whom I have never even seen footwork and only 2 videos. One of which was some sort of Tai Chi shadow boxing and the other which was proclaimed, by the maker, to be full of errors. And in all honesty I am not a student or studier of Cheng's. It's just a point of reference that I use him as an example. I would consider someone saying that I had footwork like Cheng's to be a compliment.
Where is the rule written, spoken, or otherwise put forth(except by you) that no one may vary from what someone taught them?
As for the "lean", I'll agree that Yang is basically not a leaning style. However, I'm pretty sure that WU stylist's might give you a slight arguement about leaning. And, yes I know that even they don't refer to it as leaning. Unless, of course, Wu style is ALSO completely wrong, which I'm betting is your way of thinking??