DVD available: https://www.amazon.com/Yang-Tai-Chi-Beginners-Jwing-Ming/dp/B006WPDKLI
This is a 11-minute clip from the DVD "Yang Tai Chi for Beginners". It includes a section of the introduction, and a brief instructional segment.
In this five-hour DVD, Dr. Yang gives step-by-step instruction of the 108-movement old-style Yang tai chi form, and explains the purpose of each movement. English subtitles.
DVD available on YMAA_com:
and on Amazon: