property GUIDFrom: String;
property IndexFrom: Integer;
These properties are ignored when this viewer displays video from TRVCamera.
Initially, a video identifier is generated in TRVCamSender component and identifies this sender (TRVCamSender.GUIDFrom property). Then you need to add this identifier to Senders property of TRVCamReceiver component. Then you need to connect a viewer to this receiver, and assign its GUIDFrom equal to one of receiver.Senders.GUIDFrom.
•GUIDFrom: '' (empty string)