Celebrating 40 years since the inception of the YMAA (Yang's Martial Arts Association):

https://ymaa.com/news-events

YouTube videos include Dr. Yang's include classical tai chi brocades, qi gong, white lotus, and his history as an engineer turned martial arts teacher in China. Here comes part 1 of a 5 part introduction to the meridians and vessels. Dr. Yang's overview and perception of terms always manages to find a context in Chinese history, etymology, and practical science.