I know feiloong sin is different from the book. I learned that form pretty early on in my days with Sifu Morne. The version we learned is even slightly more different from the one in Master Li's videos, but its nothing very majors.

I got your pm, so I will e-mail you soon.

You are right, it might be another fan form from another style, but he does it with (as you said before) Lee Koon Hung flair.
Ciao
Eduann