Code:
rtmpdump -r "rtmp://iplayertokfs.fplive.net:1935/iplayertok" -a "iplayertok?token=c3RhcnRfdGltZT0yMDE1MDIwNDEzNTIwMyZlbmRfdGltZT0yMDE1MDIwNDE3NTIwMyZkaWdlc3Q9MTRkNDc2MjliZTAwMzgyMmE3N2E5ZTZmNzE5YTZjM2M=" -f "WIN 16,0,0,235" -W "http://emp.bbci.co.uk/emp/SMPf/1.11.0/StandardMediaPlayerChromelessFlash.swf" -p "http://www.bbc.co.uk/iplayer/episode/b0520v1w/count-arthur-strong-series-2-5-still-life" -C O:1 -C O:0 -y "mp4:3200kbps/modav/bUnknown-19dc8e93-45ad-40e1-8f85-731f6184ac27_b0520v14_1422825736500" -o "2015-02-04_04-59-05_bUnknown-19dc8e93-45ad-40e1-8f85-731f6184ac27_b0520v14_1422825736500.flv"
for the hd format
but i think the code is limited in time