Discover Video has published an App on the Samsung Smart TV store called "Signage". This app shows a default signage template, with default content.
The Signage App is used with the DEVOS system and with the Streamsie Service. With this, you can create new templates, playlists, and to manage the signage. Typically, a corporation, school, or other organization has a DEVOS system and uses the Signage App within their organization to display desired content.
A typical "consumer" would have no access to a DEVOS system and cannot control the Signage App. However, a new web portal, Streamsie Service, is under development that will provide such capability in the near future.