Stratus only does P2P lookup/introduction/rendezvous. there are no video streams on Stratus to play. the only streams to be played via your RTMFP connection are those being published live by other peers also connected to Stratus.
Flash Player can't publish a recorded stream to a peer or a group. it can only publish your live camera/microphone.
at this time, we have no shipping products that can publish a recorded stream over RTMFP.