Appreciate any feedback. I am going to an event at a restaurant that has three TVs (non-smart TVs), each with HDMI inputs (and the restaurant has its own wifi network). On my Macbook Air I have a slideshow that I built in iMovie. I want to sling the slideshow so that it plays on all three TVs simultaneously. What is the best way to do that? Chromecasts? (The searches of done come back with conflicting answers on whether I could sling to multiple Chromecasts at once.) Apple TV? (I bet that would work, but I don't want to buy three Apple TVs for one event.) Just trying to find a simple and/or cheap method. Thanks for any suggestions.