The Leaderhead body is not going to connect to the animations. There's no BIP in the LH body. That means none of the bones were transferred over.
Transplanting bodies doesn't work on LH like units. You have to re-bone, which means reattaching every vertex (the little point in blender) to a bone. It takes a lot of time to transplant a body, and transplanting a head is a nightmare (you always want to attach a body to a head and not vice versa).
This animation is weird anyway because Chiang/Tachnechobrus doesn't move his lower body...
We might be able to use this body but you won't be able to use any other animations on it.
This is why I don't want to do a video.
Every leaderhead is unique and sometimes takes hours upon hours to do of boring work. There's a reason I like units better.
Let me think about it and I might be able to do something with him later. No promises though! This is time-consuming.