The ones you see now in the movie are a camcleat on top, a ronstan back to back block where on top you run a line that comes from the camcleat and is used to adjust the height. The line is connected to a 1.5m bungee that is tied up high at the trapeze cable. In that way the line is never tangled.
At the lower block of the back to back ronstan block you run the line coming from the bungee at the trampoline and on the other end it is attached to the hook.
The ronstan back to back needs to be handled with care though, so for future we will use a shackle + harken microblock 224. Let me know if you still have questions!