You can but it may take you a while. Download one of the videos with the music on that you want using some sort of script, convert to a suitable film type ie .mov .wmv, import into any editing programme, WMM should work fine, delete the movie track and render as an MP3.
you could replicate it yourself.. i mean it's not like it's complex or anything.. i like how simple it is.. very eerie.. or create one similar to it.. but your own take.
well i use zamzar
what i do is i find the video i want, go to www.zamzar.com and then type the url which is like the "http://www.whatever.com/42t3462t347" and then you put that in there and then it sends you an email and you download it as an mp3 file and save it to your computer
it might sound complicated but it does work at least 90% of the time.
maybe it helped, maybe it didnt, but if it did your welcome
and it if turns out that its illegal...you didnt hear it from me