I was hoping you might chime in and offer a comment, Xue Sheng.
Its amazing how Tai Chi players interpret the postures in so many different ways. At about 0:13 - 0:15 that appears to be a throw derived from Yang's Brush Knee and Push posture tossing the guy off to the side. Honestly, I had never thought about it like that. And the next demo is him thwacking the guy in the side of the neck with the same posture.
Not sure if that's in the latest Official Wushu Duanwei Exam! (lol)