How to record rtsp:// .3gp streaming videos from YouTube Mobile

has anyone been able to rip you tube mobile streams ?? Im not talking about the
Flv format I mean the RTSP streams used for the mobile content Im able to view the stream from just about any media player such as QT or Real player but every single stream ripper i have tried fails here is a direct link to the 3gp file

rtsp://rtsp.youtube.com/youtube/videos/fSEqS2fPOlY/video.3g2


Thanks in advance