I want to shoot an educational video with two cameras, one main camera on the subject, and another bullet/lipstick camera for closeup shots. While considering this type of shoot, I'm thinking of a lot of problems that need to be solved. For example, does some device exist that will allow me to start (and stop) recording both cameras at the same time? I've read a little on multicam shoots where people talk about using video mixers and all kinds of complex equipment, but I really don't want anything too complicated.. Or maybe both cameras recording to some media and the ability to switch from one camera to another. For example, when the subject says "show the closeup," I can press a button and the bullet cam's picture gets recorded instead of the main camera.. Does any of what I'm saying make sense? Please ask if you need me to clarify?