Fugg that happy horse *s-worde. Im no gopro hero. The only thing I do in the tree is work. I'll snap the odd pic when I'm taking a break, but other than that I'm up there for maximum destruction.
August has a decent vid or two of zip lining. Ifn that doesn't do it for ya, I'd be happy to talk you through it on the phone. It does require a ground man with at least half a brain cell to run the other end of the zip line (gotta tension the line and release it at the right time). Also I dont like to zipline huge weight so spar chunks are best negative block rigged down if possible.
I'm assuming the tree leans over the road a fair amount?