Offline behavior
What a screen does when the network drops, and what happens when it comes back.
A paired screen keeps a copy of its schedule and of every file in its playlists on the device, and downloads new files as soon as a playlist changes rather than waiting for each item to come up. If the network drops, it keeps playing. The grace period is 7 days; after that, the screen shows an offline notice until the connection returns.
When the connection returns, the screen picks up where it left off, sends the play records it saved while offline, and checks for anything that changed. You don't need to do anything.