I just had some observations of the guy in the stills doing the spear exercise, I train Bagua and some Taiji in Hong Kong and my teacher also teaches Xingyi. I practice a lot of pole shaking.
His shoulders are lifted (creating a lot of tension) and his elbows are flared out to the side (not so good for empty hand as it leaves your elbows very vulnerable to being locked). I was taught to finish with the elbows down, and palms facing upwards. I don't train Aunkai but just to throw out there to discuss.