This might be a question too complicated to answer in a short post. But I'm very, very curious in how film was broadcasted. Obviously, it was not put through equipment that we use to enjoy our films. And how were the commercials added at just the right moment? Were they already edited into the film, or did someone have to be right there to start a commercial when it was time for one? Could the equipment be left unattended? It's all very fascinating to me.