Is it possible only to watch remote streams without access to my camera/microphone? Imagine that I only want to watch debate between Obama and Roomney.
It is possible, but if there are many viewers you will not benefit of peer2peer with webrtc only. You will need a server with an MCU that dispatch the video to viewers only.
EDIT: Obamas & Roomneys browser would go bananas if they needed to connect a stream to every viewer. Just added that for clarification.
Regards Uffe