Couple of vids:
Choy Li Fut heigong (qigong) set:
http://www.youtube.com/watch?v=PZ4Mdzs2jmk
Note that this is NOT taiji.
Bunch of Hung Gar and other Southern KF styles:
http://www.youtube.com/watch?v=o2l8c1-TlnM
Check out around 3:10. See how the guy sets his weight on his legs? The frame rate is kind of screwed up though.