I bring Captured By Robots to the animatronics conversation.
Here is a live video http://www.youtube.com/watch?v=64GbhskV6OI
So, I've been reading and watching videos of this thing nonstop since you posted it. It's fascinating and seriously terrifying and very cool. It seems like the robots are actually playing all the music live - DRMBOT0110 and AUTOMATOM and the Ape Which Hath No Name and the Son of the Ape Which Hath No Name definitely are, and I'm pretty sure GTRBOT666 is too. GTRBOT666's whole setup is insane.
I can't wrap my head around how the Headless Hornsmen would be playing live, but I hope they are.