you can use
RTMPexplorer.
Code:
http://rapidshare.com/files/449917464/rtmpexplorer.zip
it requires
rtmpdump package which can be downloaded from following link
Code:
http://www.mediafire.com/file/nqw77xqpxoio77o/rtmpdump-2.3.zip
put all files in one folder and run RtmpExplorer.exe. visit your target site in it and it will automatically save the video being played.