Try
Code:
rtmpdump -r "rtmp://myvideo3fs.fplive.net/myvideo3/?token=c3RhcnRfdGltZT0yMDE0MDcwNDE3MTUzMiZlbmRfdGltZT0yMDE0MDcwNDIyMTUzNyZkaWdlc3Q9NjNkYmQ0N2M2Yzg0ODVmZTkyMzA2NTgwMGViZGEyODk=" -y "flv:movie39/88/9410164?token=c3RhcnRfdGltZT0yMDE0MDcwNDE3MTUzMiZlbmRfdGltZT0yMDE0MDcwNDIyMTUzNyZkaWdlc3Q9NjNkYmQ0N2M2Yzg0ODVmZTkyMzA2NTgwMGViZGEyODk=" -a "myvideo3?token=c3RhcnRfdGltZT0yMDE0MDcwNDE3MTUzMiZlbmRfdGltZT0yMDE0MDcwNDIyMTUzNyZkaWdlc3Q9NjNkYmQ0N2M2Yzg0ODVmZTkyMzA2NTgwMGViZGEyODk=" -W "http://is5.myvideo.de/de/player/mingR13y/cartridge/video/video.swf" -R -e -o schneemann.flv
but the token spires. Atresdownloader can help you