I bought the demonstration VCD on this during the 90s but only watched it last week. The 42 form Yang Style Taichi was modified from the original by a guy called Li De Yin, chief coriographer of Tang Taichi for the 11th Asian Game, chief judge for Chinese National Taiji quan and jian. He was also a famous judge for Yang style Taichi internationally and a lecturer in China People University. The person demonstrating is Chen Si Tan, Taichi champion for 1993 International Wushu competition and 1990 Beijing 11th Asian Games. He won over 30 gold medals for Taiji Quan and known as Taiji prince.
The strokes were elegance for display, and it ends there.