Yodeck was designed from scratch so that anyone can use it. Forget the mambo-jumbo tech-stuff. The service is really easy to use and you can order Yodeck Playboxes that are really plug-and-play. Really. Have a look at the single-page Quick-Start Guide of Yodeck Playbox.
Once you get your Yodeck Playboxes installed, you just log into https://app.yodeck.com and manage them all. So simple.