NDI cameras usually refer to cameras that support Network Device Interface protocol, which can transmit video signals over the network so that you can add NDI sources in OBS to capture the camera's image.PTZ control is PTZ control, which means controlling the camera's pan, tilt, and zoom functions.OBS-PTZ control plug-in is a third-party OBS-PTZ Control Plugin is a third-party plugin that can be used to directly control PTZ-enabled cameras in OBS, such as NDI cameras.