Like the Zoom desktop application, Zoom Rooms can share a second camera. This allows you to use two cameras at the same time in a Zoom Room. 

Prerequisites for screen sharing a camera in a Zoom Room

• Zoom Rooms version Global minimum version or higher
• USB based web camera 

How to screen share with a camera in a Zoom Room

1. Start or join a meeting using the Zoom Rooms controller
2. Tap the Share Content button on the Zoom Room controller.
3. Tap Camera.
4. Tap the camera you want to share.
5. (Optional) To change the camera being shared, tap another camera on the list. 
6. When finished sharing, tap Stop Current Sharing.