Userful supports "any and many" simultaneous sources including video, HDMI or SD capture, desktop apps, multiple browser sessions, local desktops over the network, RDP, RTSP etc.
Access levels can be customized using Role-Based Access Control (RBAC).
An on-premise server can support up to 100+ screens on a single video wall or deployment using a single commercially available, off the shelf Server that is a make and model certified by Userful. Add an optional second Server for automated failover.
On-premise server connects to the displays over the Local Area Network, which (if needed) can be an isolated network.
Use Smart Displays or an Adapter
Supported Smart Displays can connect directly to the Userful server with no additional hardware required, just the Userful uClient App which installs directly onto the displays. Alternatively any display can be used by adding an adapter such as a zero client receiver (a stateless device with no moving parts, no software or processor that outputs pixels to the displays via HDMI).