guessing rtmpe url of MTV.com

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Hi there

Does anyone know how the MTV URLs are usually constructed?

I'm trying to guess the url of a show which says it's no longer available, however I suspect/hope that it might be still on their servers since every file related to the video is still there (snapshots, description, etc)

here are unavailable Crystal Castles interviews on MTV Subterranean I'd like to get to see:

http://www.mtv.com/videos/interview/...-process.jhtml
http://www.mtv.com/videos/interview/...-suicide.jhtml
http://www.mtv.com/videos/interview/...etallica.jhtml
http://www.mtv.com/videos/interview/...usicians.jhtml
http://www.mtv.com/videos/interview/...r-albums.jhtml

looking at another video from the same show to see how the URLs look like:

http://www.mtv.com/videos/misc/39729...ew-album.jhtml

rtmpe://cp10740.edgefcs.net/ondemand/mtvcomstor/_!/mtv.com/onair/subterranean/mt_sub_depeche_mode_rt169271_s2_448x336_650.flv


and another one:

http://www.mtv.com/videos/interview/...gwriting.jhtml

rtmpe://cp10740.edgefcs.net/ondemand/mtvcomstor/_!/mtv2.com/onair/subterranean/young_veins/m2_subterranean_tyv_rt212307_beingasongwriter_384x216_450.mp4


all the other parts I could try and guess but where does the number in bold come from?

any help would be appreciated.