[liveuser@localhost ~]$ python
Python 2.7.5 (default, May 16 2013, 13:44:12) 
[GCC 4.8.0 20130412 (Red Hat 4.8.0-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import urllib,urllib2,sys,re#,xbmcplugin,xbmcgui,xbmcaddon,xbmc
>>> #def playvid(url):
>>> html=urllib2.urlopen('http://www.youtube.com/watch?v=0vf0Z_zPN1c').read().replace(",","\\\n")
>>> for line in html.split("\n"):
...      if "itag=22" in line:
...      #print " line = " + line
...        print " line = " + line
...        s2 = line
... 
 line = sig=A5EBC54AE15DE4035A4BB549BFFB67F963CDF9CF.4B7CA8CF0AEA0B1B6210AB470EDB3CF0D2CF81CD\u0026itag=22\u0026type=video%2Fmp4%3B+codecs%3D%22avc1.64001F%2C+mp4a.40.2%22\u0026url=http%3A%2F%2Fr11---sn-ab5e6ner.c.youtube.com%2Fvideoplayback%3Fitag%3D22%26ratebypass%3Dyes%26expire%3D1379189671%26id%3Dd2f7f467fccf3757%26sver%3D3%26fexp%3D906399%252C901480%252C932245%252C910207%252C921076%252C916626%252C924606%252C929117%252C929121%252C929906%252C929907%252C929922%252C929923%252C929127%252C929129%252C929131%252C929930%252C936403%252C925726%252C936310%252C925720%252C925722%252C925718%252C925714%252C929917%252C906945%252C929933%252C920302%252C906842%252C913428%252C920605%252C919811%252C935020%252C935021%252C913563%252C919373%252C930803%252C908536%252C938701%252C931924%252C934005%252C936308%252C909549%252C935006%252C901608%252C900816%252C912711%252C934507%252C912714%252C907231%252C936312%252C906001%26ipbits%3D8%26mt%3D1379166992%26key%3Dyt1%26upn%3DMzz04v0wJvA%26source%3Dyoutube%26sparams%3Dcp%252Cid%252Cip%252Cipbits%252Citag%252Cratebypass%252Csource%252Cupn%252Cexpire%26mv%3Dm%26ms%3Dau%26ip%3D173.167.210.137%26cp%3DU0hWTlFTV19MS0NONl9JTUFHOjc4b3ZoY1JLVnd0\u0026fallback_host=tc.v4.cache1.c.youtube.com\u0026quality=hd720\
>>> s1 = re.search('url=(http.+?)\\\\', s2)
>>> sig = re.search('sig=(.+?)\\\\', s2)
>>> yturl = s1.groups() + sig.groups()
>>> yturl = str(tuple(yturl))
>>> print "\n ----- yturl = " + yturl

 ----- yturl = ('http%3A%2F%2Fr11---sn-ab5e6ner.c.youtube.com%2Fvideoplayback%3Fitag%3D22%26ratebypass%3Dyes%26expire%3D1379189671%26id%3Dd2f7f467fccf3757%26sver%3D3%26fexp%3D906399%252C901480%252C932245%252C910207%252C921076%252C916626%252C924606%252C929117%252C929121%252C929906%252C929907%252C929922%252C929923%252C929127%252C929129%252C929131%252C929930%252C936403%252C925726%252C936310%252C925720%252C925722%252C925718%252C925714%252C929917%252C906945%252C929933%252C920302%252C906842%252C913428%252C920605%252C919811%252C935020%252C935021%252C913563%252C919373%252C930803%252C908536%252C938701%252C931924%252C934005%252C936308%252C909549%252C935006%252C901608%252C900816%252C912711%252C934507%252C912714%252C907231%252C936312%252C906001%26ipbits%3D8%26mt%3D1379166992%26key%3Dyt1%26upn%3DMzz04v0wJvA%26source%3Dyoutube%26sparams%3Dcp%252Cid%252Cip%252Cipbits%252Citag%252Cratebypass%252Csource%252Cupn%252Cexpire%26mv%3Dm%26ms%3Dau%26ip%3D173.167.210.137%26cp%3DU0hWTlFTV19MS0NONl9JTUFHOjc4b3ZoY1JLVnd0', 'A5EBC54AE15DE4035A4BB549BFFB67F963CDF9CF.4B7CA8CF0AEA0B1B6210AB470EDB3CF0D2CF81CD')
>>> yturl = yturl.replace("', '","&signature=")
>>> yturl = yturl.replace("%3A",":")
>>> yturl = yturl.replace("%2F","/")
>>> yturl = yturl.replace("%3F","?")
>>> yturl = yturl.replace("%3D","=")
>>> yturl = yturl.replace("%252C","%2C")
>>> yturl = yturl.replace("%26","&")
>>> yturl = yturl.replace("%253A",":")
>>> yturl = yturl.replace("('","\"")
>>> yturl = yturl.replace("')","\"")
>>> yturl = yturl.replace('"','')
>>> print "\n yturl.replace = " + yturl

 yturl.replace = http://r11---sn-ab5e6ner.c.youtube.com/videoplayback?itag=22&ratebypass=yes&expire=1379189671&id=d2f7f467fccf3757&sver=3&fexp=906399%2C901480%2C932245%2C910207%2C921076%2C916626%2C924606%2C929117%2C929121%2C929906%2C929907%2C929922%2C929923%2C929127%2C929129%2C929131%2C929930%2C936403%2C925726%2C936310%2C925720%2C925722%2C925718%2C925714%2C929917%2C906945%2C929933%2C920302%2C906842%2C913428%2C920605%2C919811%2C935020%2C935021%2C913563%2C919373%2C930803%2C908536%2C938701%2C931924%2C934005%2C936308%2C909549%2C935006%2C901608%2C900816%2C912711%2C934507%2C912714%2C907231%2C936312%2C906001&ipbits=8&mt=1379166992&key=yt1&upn=Mzz04v0wJvA&source=youtube&sparams=cp%2Cid%2Cip%2Cipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire&mv=m&ms=au&ip=173.167.210.137&cp=U0hWTlFTV19MS0NONl9JTUFHOjc4b3ZoY1JLVnd0&signature=A5EBC54AE15DE4035A4BB549BFFB67F963CDF9CF.4B7CA8CF0AEA0B1B6210AB470EDB3CF0D2CF81CD