I study, practice, and teach Tai Chi in the Tung Family style. Here’s some resources I’ve found to be helpful:
Tai Chi Gong:
Including the Tung Family Salute:
Tai Chi Ch’uan (Slow Set – Tung Style):
Master Kai Ying Tung performing Tai Chi Ch’uan
(Note: The set used to be performed with a series of 5 Waving-Hands-Like-Clouds but is now taught as 3 Waving-Hands-Like-Clouds).
Dr. Mark Cheng demonstrating some Tai Chi applications:
Master Kai Ying Tung Academy of T’ai Chi Ch’uan