From the creator(s):
Music, food, drinks, and games are all necessary components for the perfect Pool Party so the boys and I built a simple house-wide chain reaction machine to take care of all of that and even “push” me in the pool at the end. Enjoy.
More on the original yt page
Just a copy here because yt does not generate a thumbnail on ws, so boring for sharing.
Full credits AND admiration to the creators.