I parsed the "url_encoded_fmt_stream_map=" entries with the direct video urls of some formats, example (decoded):
http://r7---sn-2apm-f5f6.c.youtube.com/videoplayback?gcr=de&cp=U0hUTFVUUl9LUENONF9NTlZHOkpGR0NWdWtvSk15&source=youtube&ip=46.59.194.67&upn=KHmKgXE5di4&fexp=917000,906357,911115,916611,920704,912806,928001,922403,922405,929901,913605,929104,913546,913556,908496,920201,913302,919009,911116,901451,902556&ms=au&itag=45&mt=1357571596&sparams=cp,gcr,id,ip,ipbits,itag,ratebypass,source,upn,expire&id=e4b675c403014739&expire=1357594666&ipbits=8&mv=m&newshard=yes&ratebypass=yes&sver=3&key=yt1&signature=1C8204D1180CAB0B57E3B3331409BD055CBA25B1.73FBEC95E020BBCAC6485D62601E8CF05ACA72DE,quality=hd720&itag=22&fallback_host=tc.v23.cache2.c.youtube.com&type=video/mp4;+codecs="avc1.64001F,+mp4a.40.2"
But I can't download or view it! VLC says: Cannot open! Firefox remains empty (white window, no error message)! Are the urls after "url_encoded_fmt_stream_map=" right?