Below are some of the shorter offerings.
There's a 8-minute video featuring Don Fiore here:
This 15-minute video provides instruction in Tai Chi walking:
The embedding feature has been disabled, but you can see (and work with) a woman practicing the 24 form in this 9-minute video at youtube.
This video emphasizes Tai Chi as an aid to stronger bones:
There are a number of videos that I use part of, skipping the introductory material at the beginning once I've watched the complete video once. These are by Dr. Paul Lam:
- Tai Chi for Energy here (8 minutes) and here (35 minutes)
- Tai Chi for Arthritis
- Tai Chi for Beginners (30 minutes)
- The 24 Form (15 minutes)