Example A:

Official Chart Bite - 25 Jan

pid=p02gl0w4

http://www.bbc.co.uk/programmes/p02gl0w4/playlist.json ->

vPID=p02hp6ww

http://open.live.bbc.co.uk/mediaselector/5/select/version/2.0/mediaset/pc/vpid/p02hp6ww
(UK IP) -> 

L3 HD stream:

<media bitrate="2800" encoding="h264" expires="2015-02-25T07:30:00Z" height="720" kind="video" media_file_size="154355480" service="pc_streaming_hd" type="video/mp4" width="1280"><connection application="iplayertok" authExpires="2015-02-05T05:25:39+00:00" authExpiresOffset="6937" authString="token=c3RhcnRfdGltZT0yMDE1MDIwNTAxMzAwMiZlbmRfdGltZT0yMDE1MDIwNTA1MzAwMiZkaWdlc3Q9NWFlN2YwMWQyYWU4YTI2MTM3ZjBhMmE2ODM2NDFiOTc=" dpw="50" identifier="mp4:3200kbps/modav/bUnknown-d14cad8b-7699-4987-a033-70da9ecd6c64_p02hp6ww_1422275170418" priority="5" protocol="rtmp" server="iplayertokfs.fplive.net" supplier="level3"/>

rtmpdump command:

rtmpdump -r "rtmp://iplayertokfs.fplive.net:1935/iplayertok" -a "iplayertok?token=c3RhcnRfdGltZT0yMDE1MDIwNTAxMzAwMiZlbmRfdGltZT0yMDE1MDIwNTA1MzAwMiZkaWdlc3Q9NWFlN2YwMWQyYWU4YTI2MTM3ZjBhMmE2ODM2NDFiOTc=" -f "WIN 16,0,0,296" -W "http://emp.bbci.co.uk/emp/SMPf/1.11.0/StandardMediaPlayerChromelessFlash.swf" -p "http://www.bbc.co.uk/iplayer/episode/p02gl0w4/official-chart-bite-25-jan-meghan-trainor" -C O:1 -C O:0 -y "mp4:3200kbps/modav/bUnknown-d14cad8b-7699-4987-a033-70da9ecd6c64_p02hp6ww_1422275170418" -o "p02hp6ww_1422275170418.flv" ->

RTMPDump v2.4 GIT-2014-03-02 (Compiled by KSV)
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO:   duration                514.72
INFO:   moovPosition            36.00
INFO:   width                   1280.00
INFO:   height                  720.00
INFO:   videocodecid            avc1
INFO:   audiocodecid            mp4a
INFO:   avcprofile              100.00
INFO:   avclevel                41.00
INFO:   aacaot                  2.00
INFO:   videoframerate          25.00
INFO:   audiosamplerate         48000.00
INFO:   audiochannels           2.00
INFO: trackinfo:
INFO:   length                  12868000.00
INFO:   timescale               25000.00
INFO:   language                und
INFO: sampledescription:
INFO:   sampletype              avc1
INFO:   length                  24706048.00
INFO:   timescale               48000.00
INFO:   language                und
INFO: sampledescription:
INFO:   sampletype              mp4a
3571.922 kB / 13.40 sec (2.6%)


Example B:

Official Chart Bite - 1 Feb

pid=p02hhycw

http://www.bbc.co.uk/programmes/p02hhycw/playlist.json -> 

vPID=p02hhygq

http://open.live.bbc.co.uk/mediaselector/5/select/version/2.0/mediaset/pc/vpid/p02hhygq 
(UK IP) -> 

L3 HD stream:

<media bitrate="2800" encoding="h264" expires="2015-03-04T07:30:00Z" height="720" kind="video" media_file_size="151157869" service="pc_streaming_hd" type="video/mp4" width="1280"><connection application="iplayertok" authExpires="2015-02-05T05:18:36+00:00" authExpiresOffset="6194" authString="token=c3RhcnRfdGltZT0yMDE1MDIwNTAxMzUyMiZlbmRfdGltZT0yMDE1MDIwNTA1MzUyMiZkaWdlc3Q9YzRiM2Q4ZmZlOWFiNjExYTgyZmE0YTg2M2Y3MTdlZGM=" dpw="50" identifier="mp4:3200kbps/modav/bUnknown-ddf66dc2-df94-4dbd-9b21-9492af1272e1_p02hhygq_1422847337990" priority="5" protocol="rtmp" server="iplayertokfs.fplive.net" supplier="level3"/>

rtmpdump -r "rtmp://iplayertokfs.fplive.net:1935/iplayertok" -a "iplayertok?token=c3RhcnRfdGltZT0yMDE1MDIwNTAxMzUyMiZlbmRfdGltZT0yMDE1MDIwNTA1MzUyMiZkaWdlc3Q9YzRiM2Q4ZmZlOWFiNjExYTgyZmE0YTg2M2Y3MTdlZGM=" -f "WIN 16,0,0,296" -W "http://emp.bbci.co.uk/emp/SMPf/1.11.0/StandardMediaPlayerChromelessFlash.swf" -p "http://www.bbc.co.uk/iplayer/episode/p02hhycw/official-chart-bite-1-feb-fergie-calling" -C O:1 -C O:0 -y "mp4:3200kbps/modav/bUnknown-ddf66dc2-df94-4dbd-9b21-9492af1272e1_p02hhygq_1422847337990" -o "p02hhygq_1422847337990.flv" -> 

RTMPDump v2.4 GIT-2014-03-02 (Compiled by KSV)
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
ERROR: Closing connection: NetStream.Failed

If you run the above command with the -V switch, you get in the last section:

DEBUG: HandShake: Genuine Adobe Flash Media Server
DEBUG: HandShake: Handshaking finished....
DEBUG: RTMP_Connect1, handshaked
DEBUG: Invoking connect
INFO: Connected...
DEBUG: HandleServerBW: server BW = 2500000
DEBUG: HandleClientBW: client BW = 2500000 2
DEBUG: HandleChangeChunkSize, received: chunk size change to 16384
DEBUG: RTMP_ClientPacket, received: invoke 240 bytes
DEBUG: (object begin)
DEBUG: Property: <Name:            no-name, STRING:     _result>
DEBUG: Property: <Name:            no-name, NUMBER:     1.00>
DEBUG: Property: <Name:            no-name, OBJECT>
DEBUG: (object begin)
DEBUG: Property: <Name:             fmsVer, STRING:     FMS/4,5,3,101>
DEBUG: Property: <Name:       capabilities, NUMBER:     255.00>
DEBUG: Property: <Name:               mode, NUMBER:     1.00>
DEBUG: (object end)
DEBUG: Property: <Name:            no-name, OBJECT>
DEBUG: (object begin)
DEBUG: Property: <Name:              level, STRING:     status>
DEBUG: Property: <Name:               code, STRING:     NetConnection.Connect.Su
ccess>
DEBUG: Property: <Name:        description, STRING:     Connection succeeded.>
DEBUG: Property: <Name:     objectEncoding, NUMBER:     3.00>
DEBUG: Property: <Name:               data, ECMA_ARRAY>
DEBUG: (object begin)
DEBUG: Property: <Name:            version, STRING:     4,5,3,101>
DEBUG: (object end)
DEBUG: (object end)
DEBUG: (object end)
DEBUG: HandleInvoke, server invoking <_result>
DEBUG: HandleInvoke, received result for method call <connect>
DEBUG: sending ctrl, type: 0x0003
DEBUG: Invoking createStream
DEBUG: RTMP_ClientPacket, flex message, size 16410 bytes, not fully supported
DEBUG: (object begin)
DEBUG: Property: <Name:            no-name, STRING:     onBWCheck>
DEBUG: Property: <Name:            no-name, NUMBER:     2147484863.00>
DEBUG: Property: NULL
DEBUG: Property: <Name:            no-name, STRING:     ! v 1 < m N % h 9 n G t
% J M p 1 f # t % ^ u ( I ^ ) < 5 : ? @ a V O < S n [ * y N y T e * 3 P 1 F ! 6
#   + ( w > W \ - : = ` _ 6 q $ - 0 e x G . ' 4 [ * / 0 / & _ l ] @ k 8 ) > i |
+ & C " ! 6 / D 5 r ; X 9 . g 4 % 6 - 0 Q & a L c b U X i " 7 >
DEBUG: (object end)
DEBUG: HandleInvoke, server invoking <onBWCheck>
DEBUG: RTMP_ClientPacket, received: invoke 29 bytes
DEBUG: (object begin)
DEBUG: Property: <Name:            no-name, STRING:     _result>
DEBUG: Property: <Name:            no-name, NUMBER:     2.00>
DEBUG: Property: NULL
DEBUG: Property: <Name:            no-name, NUMBER:     1.00>
DEBUG: (object end)
DEBUG: HandleInvoke, server invoking <_result>
DEBUG: HandleInvoke, received result for method call <createStream>
DEBUG: SendPlay, seekTime=0, stopTime=0, sending play: mp4:3200kbps/modav/bUnkno
wn-ddf66dc2-df94-4dbd-9b21-9492af1272e1_p02hhygq_1422847337990
DEBUG: Invoking play
DEBUG: sending ctrl, type: 0x0003
DEBUG: HandleChangeChunkSize, received: chunk size change to 16384
DEBUG: RTMP_ClientPacket, received: invoke 121 bytes
DEBUG: (object begin)
DEBUG: Property: <Name:            no-name, STRING:     onStatus>
DEBUG: Property: <Name:            no-name, NUMBER:     3.00>
DEBUG: Property: NULL
DEBUG: Property: <Name:            no-name, OBJECT>
DEBUG: (object begin)
DEBUG: Property: <Name:              level, STRING:     error>
DEBUG: Property: <Name:               code, STRING:     NetStream.Failed>
DEBUG: Property: <Name:        description, STRING:     206 Partial Content>
DEBUG: Property: <Name:           clientid, STRING:     qAAzQDAA>
DEBUG: (object end)
DEBUG: (object end)
DEBUG: HandleInvoke, server invoking <onStatus>
DEBUG: HandleInvoke, onStatus: NetStream.Failed
ERROR: Closing connection: NetStream.Failed
DEBUG: Closing connection.

So, the handshake succeeds, the connection succeeds, 
but the stream fails due to "206 Partial Content".

Possibly something has gone wrong with the file upload on the server (?)