If you have an android TV you may download straight into it, but if you dont have an ANdroid TV get a android TV stick then you can use any LCD or LED TV which has HDMI & USB slots to support an "Android TV Stick".An android TV stick/media player just like a Amazon fire stick will run the app.(*see documentation for info)
Open the app,login with the Username & Password if you are already registered.If you dont have a registered account got to Sign Up to open an account.
Goto my account on https://www.zyonstudios.co.uk and login with the username and password
Goto control panel from the top menu.
Goto My Stations and add a new station.This will be one of your TV screen
Click the station you created and add slides to the station
Remember to put a countdown time and select the playmode
Click play to see previoew of your screen
Once you are happy activate and you are ready to go.