American-Gymnast.com is one of the best places on the internet for gymnastics coaches.
On that site Mohini Bhardwaj, 2004 US Olympic Team captain, has an article where she teaches the free hip circle on bars with a series of video clips. And she is the demonstrator.
After seeing the article, coach Jacob Small took a laptop into the gym (connected by wireless internet) and had the kids try Mohini’s progressions. They loved it.
To see for yourself you would need to join American-Gymnast.com (free membership for now) and click on the TRAINING TIPS link.
Gymnastics Coaching.com 