I think you found your answers: rtmpdump doesn't work for rtmfp.
rtmpf is a udp-based protocol that is used for p2p-interaction. Ypu may find details at
http://peer-stream.com/ where your stream is originated.
Noone has has a working library/app for RTMFP. And it's not as simple as RTMP. If someone knows something different, I'd be pleased to hear about it.