I'm looking for some videos which build on Lam Kam Chuen's excellent series ( )  I want to increase the duration of my practice and also learn some more advanced postures/internal work. I am aware I could do this without videos/with a teacher, but I'm specifically interested in practice videos - either online or to purchase.   Any suggestions/recommendations? It doesn't have to be the same exact system, but I like the overall style and approach.