Links to Tai Chi site that I found are helpful

Showing the basic 24 short form on YouTube.com by Dr Lam-I love youtube.com

http://www.taiji.de/taiji/head5e/index.htm

She is also demonstrating the 24 short form and she is in a deeper stances. I Think its important to note that the principle are the same but 2 different style from the individual between the high stance and deep stances. You are your own resistance and by getting deeper you end up increasing the load bearing on your body. Sort of like riding a ten speed bike, and you need to get used to the slower gears before increasing the load.

Great list of videos of Tai Chi Master in push hand exercises.

A great find from one of my students that link this to me.