Please see below an example of how a Slideshow can be displayed on big screens:
All you need to do is connect a device to the big screens, it will read all the photos off the server instantly and display them in the slideshow.
Lack of internet will always be a problem if you would like to use this option, with slow internet, photos are displayed in the loop with new ones being added into a slideshow as soon as uploaded to the server.
Instructions where to find URL to slideshow in Snappie backend:
Go to Gallery Settings
Scroll down the page to URL to Slideshow
Copy the URL and Insert within browser
Make it FULL SCREEN
Scroll down the page to URL to Slideshow
Copy the URL and Insert within browser
Make it FULL SCREEN