Just thinking on top of my head, can you consider doing an RTMP switching switching where in different sights can be using RTMP outputs and congregate in one BigMarker event. This will ensure high level flexibility in site setups and video quality. The idea came up when we were doing an event recently where in one site is doing RTMP and the rest were just turning on their cameras. Video signal was ok but unfortunately for sites using the webcams, their audio is compromised because of the system set up natively handling audio feeds coming into a BigMarker event.