YouTube Videos downloader

fetch_all.rb

#!/usr/bin/env ruby -wKU

#### script requires wget app
# Copyright RaVbaker - MIT license

# list of video urls, each url in single line
videos = %w{
http://www.youtube.com/watch?v=lFJey0tOvBg
http://www.youtube.com/watch?v=HAtsUpBlnf8
http://www.youtube.com/watch?v=V6eHKcZkDtg
http://www.youtube.com/watch?v=ynGnvuh0ELQ
http://www.youtube.com/watch?v=bVT7QlYC7JQ
http://www.youtube.com/watch?v=PuoTbYxNJnU
http://www.youtube.com/watch?v=DgH6NaJHfVQ
http://www.youtube.com/watch?v=9D35JSWSJAg
http://www.youtube.com/watch?v=9QMZQkKuYjo
http://www.youtube.com/watch?v=YfSBYf9h7qk
http://www.youtube.com/watch?v=Ig0ekhtAfkY
http://www.youtube.com/watch?v=mXM38kjzK-M
http://www.youtube.com/watch?v=V2AvmoBJdU4
http://www.youtube.com/watch?v=WyLEhX3oUZU
http://www.youtube.com/watch?v=oefOCk3koZo
http://www.youtube.com/watch?v=8-pzJXUiXrM
http://www.youtube.com/watch?v=glHKJ359Cnc
http://www.youtube.com/watch?v=CDXaY7cdTYE
http://www.youtube.com/watch?v=46U-_qzQui0
http://www.youtube.com/watch?v=fCwZN0Ht4Q8
http://www.youtube.com/watch?v=y3Rkp3oCzq4
http://www.youtube.com/watch?v=PzDgvih6JDA
http://www.youtube.com/watch?v=CUfmOLQi3RM
http://www.youtube.com/watch?v=Mi2HFAn6SgE
http://www.youtube.com/watch?v=Xr7QzEYG3N0
http://www.youtube.com/watch?v=6OIHXZthbhs
http://www.youtube.com/watch?v=4vV4SNEdLt8
http://www.youtube.com/watch?v=dtp2ZDIjMsI
http://www.youtube.com/watch?v=Y_LP6acepqQ
http://www.youtube.com/watch?v=aFnqXy1wCWU
http://www.youtube.com/watch?v=haGrozelOGA
http://www.youtube.com/watch?v=dqH6tp49uFY
http://www.youtube.com/watch?v=iHEjWGFuPh4
http://www.youtube.com/watch?v=cr1Ck1Fr60M
http://www.youtube.com/watch?v=ngXzkRWosEw
http://www.youtube.com/watch?v=k-5e935u9hE
http://www.youtube.com/watch?v=dX8VPYXd3hs
http://www.youtube.com/watch?v=BOJUzeVswYA
http://www.youtube.com/watch?v=DZzffdHNqtQ
http://www.youtube.com/watch?v=tdtAZFbvDPc
http://www.youtube.com/watch?v=7yvclGcujGY
http://www.youtube.com/watch?v=FvXWpsvu7MM
http://www.youtube.com/watch?v=s5jbwPgheqI
http://www.youtube.com/watch?v=Y7WhCOWL9Ec
http://www.youtube.com/watch?v=mueRduwpg-U
http://www.youtube.com/watch?v=n4skYKmM27k
http://www.youtube.com/watch?v=S_Lm8aN-la0
http://www.youtube.com/watch?v=1YvuLgmrpZE
http://www.youtube.com/watch?v=jDRD9eaf9qE
http://www.youtube.com/watch?v=YQ80TAESLqw
http://www.youtube.com/watch?v=dnEp5g9p8dw
http://www.youtube.com/watch?v=Nc9-iLy_rgY
http://www.youtube.com/watch?v=UjfgRO1kySM
http://www.youtube.com/watch?v=8mi8z-EnYq8
http://www.youtube.com/watch?v=H0G1yslM5rc
http://www.youtube.com/watch?v=NxCUVltVoZ8
http://www.youtube.com/watch?v=qQQYkvS5CzU
http://www.youtube.com/watch?v=lwg_KI3UewY
http://www.youtube.com/watch?v=eWsEyJCVXoo
http://www.youtube.com/watch?v=GLk5Ss7PPD0
http://www.youtube.com/watch?v=25opwF9MylQ
http://www.youtube.com/watch?v=shCDaByrf98
http://www.youtube.com/watch?v=o3Z3oAoKhDA
http://www.youtube.com/watch?v=sMT8sMOBA2Y
http://www.youtube.com/watch?v=dNzU_k5b5CY
http://www.youtube.com/watch?v=hRIwdYyvq2E
http://www.youtube.com/watch?v=slLRsFFiiRc
http://www.youtube.com/watch?v=2xsXEpdyDUg
http://www.youtube.com/watch?v=Fs1gAjUQGmI
http://www.youtube.com/watch?v=dZm3MSrYno4
http://www.youtube.com/watch?v=fYQb-uLTmYc
http://www.youtube.com/watch?v=E8TWtwT45tg
http://www.youtube.com/watch?v=9tB8y8YQM6A
http://www.youtube.com/watch?v=MyicDINS6pg
http://www.youtube.com/watch?v=S47BxSU1S3w
http://www.youtube.com/watch?v=fjUIeZHX5Aw
http://www.youtube.com/watch?v=Ka4DPvOgNnM
http://www.youtube.com/watch?v=aEZOJ-KazvU
http://www.youtube.com/watch?v=W5hfpcoCdMc
http://www.youtube.com/watch?v=T2dRPPp5ffc
http://www.youtube.com/watch?v=yny3Z2-ptpU
http://www.youtube.com/watch?v=PnfTfhkadoU
http://www.youtube.com/watch?v=rwAkYmXkU9A
http://www.youtube.com/watch?v=F3I-RXow-oc
http://www.youtube.com/watch?v=vFlu8XX2q1A
http://www.youtube.com/watch?v=x0V-LZX4zUo
http://www.youtube.com/watch?v=EbLvL12Cgsg
http://www.youtube.com/watch?v=AXx0H_kBCPE
http://www.youtube.com/watch?v=IBAuWgq0ews
http://www.youtube.com/watch?v=uhP3jrxraMk
http://www.youtube.com/watch?v=ejZkKeqB8q0
http://www.youtube.com/watch?v=1RU-ERrU1pc
http://www.youtube.com/watch?v=k36dLpbcRek
http://www.youtube.com/watch?v=_XSw9bFS3Zc
http://www.youtube.com/watch?v=OcLd2wcS-Fo
http://www.youtube.com/watch?v=qTvlkiK-YSo
http://www.youtube.com/watch?v=vTvKPxmvRFI
http://www.youtube.com/watch?v=BhCcmTsm5ck
http://www.youtube.com/watch?v=7KVPsx_oP7A
http://www.youtube.com/watch?v=z86_jYE6CDA
http://www.youtube.com/watch?v=OoiwXs6Ebwg
http://www.youtube.com/watch?v=lzJsHUVKvRc
http://www.youtube.com/watch?v=sMlkLsPWNNM
http://www.youtube.com/watch?v=gvZJKhC0CJk
http://www.youtube.com/watch?v=iVG8b89jTOA
http://www.youtube.com/watch?v=vkWdzWeRfC4
http://www.youtube.com/watch?v=mJoZ-y19ifw
http://www.youtube.com/watch?v=gksMOuDtGf0
http://www.youtube.com/watch?v=c6Xj7zH86A0
http://www.youtube.com/watch?v=eEhBor_r5eY
http://www.youtube.com/watch?v=3Vmn9Rn-lDM
http://www.youtube.com/watch?v=dqhTYhyrbwc
http://www.youtube.com/watch?v=_o8qyMcZow8
http://www.youtube.com/watch?v=LjNqM9hOkw0
http://www.youtube.com/watch?v=YPfs7DbAjfM
http://www.youtube.com/watch?v=csWWHnkKktI
http://www.youtube.com/watch?v=3FxoQshSppg
http://www.youtube.com/watch?v=oZ3YqZCYJT0
http://www.youtube.com/watch?v=1GYWcK28So8
http://www.youtube.com/watch?v=DL3vrst-ac8
http://www.youtube.com/watch?v=V_BJUBpuvFE
http://www.youtube.com/watch?v=6KTjn8LpbZM
http://www.youtube.com/watch?v=kqDvbguZsAA
http://www.youtube.com/watch?v=MDvQBnBoB8w
http://www.youtube.com/watch?v=1QlvfUGMIyQ
http://www.youtube.com/watch?v=PjXylEmMSiA
http://www.youtube.com/watch?v=ch59X0DMEXY
http://www.youtube.com/watch?v=thepzbTYuJ8
http://www.youtube.com/watch?v=zS3st_7og3A
http://www.youtube.com/watch?v=o7IiWAz3Jes
http://www.youtube.com/watch?v=t7RsueYqPgw
http://www.youtube.com/watch?v=8CKxhuVQrus
http://www.youtube.com/watch?v=ATEXTIBgH4o
http://www.youtube.com/watch?v=xm9_vmIJeMk
http://www.youtube.com/watch?v=fiIXnclf9nk
http://www.youtube.com/watch?v=K1tBjg503uU
http://www.youtube.com/watch?v=XzAaYwH5npk
http://www.youtube.com/watch?v=Z2UajUpjde0
http://www.youtube.com/watch?v=CGsY9BOrDPo
http://www.youtube.com/watch?v=ZJjljuk4JD0
http://www.youtube.com/watch?v=4IZXXh-1jzo
http://www.youtube.com/watch?v=i9duR1sX9Rk
http://www.youtube.com/watch?v=5KzdAhyz3XI
http://www.youtube.com/watch?v=lviKMjofhZ0
http://www.youtube.com/watch?v=kEd6eiP2C4Q
http://www.youtube.com/watch?v=dIEStL7riMo
http://www.youtube.com/watch?v=WakjpNgbTNo
http://www.youtube.com/watch?v=wu8MFlMRH2U
http://www.youtube.com/watch?v=Gh7NppiwSuc
http://www.youtube.com/watch?v=jMKZup6OtFk
http://www.youtube.com/watch?v=ArjvPA5q0oQ
http://www.youtube.com/watch?v=itckWrJi92M
http://www.youtube.com/watch?v=AS-GBBRW-Xo
http://www.youtube.com/watch?v=RXHfBLULyOs
http://www.youtube.com/watch?v=lL-8KGXehNY
http://www.youtube.com/watch?v=ZWo6pJmw7bI
http://www.youtube.com/watch?v=UJWUNNwZKS4
http://www.youtube.com/watch?v=4JTPYE3N9BQ
http://www.youtube.com/watch?v=z5UtqOw0Jrk
http://www.youtube.com/watch?v=OcPN30Td4-Q
http://www.youtube.com/watch?v=AHivKiSFBE0
http://www.youtube.com/watch?v=T6akmSxKX9I
http://www.youtube.com/watch?v=L6pkhoezlgc
http://www.youtube.com/watch?v=DFz_anV-Gps
http://www.youtube.com/watch?v=Zt94uplW5pQ
http://www.youtube.com/watch?v=UbqrrN4wbqQ
http://www.youtube.com/watch?v=3muiVUU0sys
http://www.youtube.com/watch?v=SIHc9LgMeaU
http://www.youtube.com/watch?v=bEi73QXP7PA
http://www.youtube.com/watch?v=GKKQyJLee84
http://www.youtube.com/watch?v=9fxuibvkZ9g
http://www.youtube.com/watch?v=OWCRop639TA
http://www.youtube.com/watch?v=h59XtnoILcQ
http://www.youtube.com/watch?v=8SY5T6TFg6c
http://www.youtube.com/watch?v=9PXrxfOb3p0
http://www.youtube.com/watch?v=4OPv8ACeuaU
http://www.youtube.com/watch?v=-8DyY8_IuA0
http://www.youtube.com/watch?v=Xblzy61pBDQ
http://www.youtube.com/watch?v=YPmGGwlRqY0
http://www.youtube.com/watch?v=-sFOKd_ZEJ8
http://www.youtube.com/watch?v=W5g-4a2PIcI
http://www.youtube.com/watch?v=fChe7bVEdHQ
http://www.youtube.com/watch?v=9IdjpH4xkGM
http://www.youtube.com/watch?v=jKcp0uQ_rUo
http://www.youtube.com/watch?v=ngGCGaIEvBU
http://www.youtube.com/watch?v=QaojSzk7Hpw
http://www.youtube.com/watch?v=CIrfGiP65UI
http://www.youtube.com/watch?v=8o1fAcyhap4
http://www.youtube.com/watch?v=Q1xFdQfq5Fk
http://www.youtube.com/watch?v=m-hcAePIkWY
http://www.youtube.com/watch?v=FHJx9RVVKFg
http://www.youtube.com/watch?v=c2yFCp6BrEA
http://www.youtube.com/watch?v=GSHJspQH15c
http://www.youtube.com/watch?v=kD2wD_MDVk4
http://www.youtube.com/watch?v=-jswWk8YLro
http://www.youtube.com/watch?v=v4XIkABA1N0
http://www.youtube.com/watch?v=4G5mH4FW-WY
http://www.youtube.com/watch?v=R1o9wbhnv94
http://www.youtube.com/watch?v=Iy9gzbQ7_3g
http://www.youtube.com/watch?v=mhrG7atAn4Q
http://www.youtube.com/watch?v=tOSoqfK9UNE
http://www.youtube.com/watch?v=Ta7tyUB-EqM
http://www.youtube.com/watch?v=KuSZmepQA_s
http://www.youtube.com/watch?v=XNCHCncvDto
http://www.youtube.com/watch?v=bIZrRYKN_RY
http://www.youtube.com/watch?v=qkcFRr7LqAw
http://www.youtube.com/watch?v=EZEOXNFgu8M
http://www.youtube.com/watch?v=W2dkDmHFMWg
http://www.youtube.com/watch?v=zaKjh2N8jN4
http://www.youtube.com/watch?v=_DhelJs0BFc
http://www.youtube.com/watch?v=BnIJ7Ba5Sr4
http://www.youtube.com/watch?v=S4-694lgERs
http://www.youtube.com/watch?v=mlz-1yfyeoU
http://www.youtube.com/watch?v=1CWDWmF0i2s
http://www.youtube.com/watch?v=_-Ol1cXIWvQ
http://www.youtube.com/watch?v=DH7FWwCgx5M
http://www.youtube.com/watch?v=5m6TeKw_e1M
http://www.youtube.com/watch?v=pszEzBql4bw
http://www.youtube.com/watch?v=_VjyktjNMoM
http://www.youtube.com/watch?v=WQ7-B4H6-aE
http://www.youtube.com/watch?v=hFzVZzMPy8Q
http://www.youtube.com/watch?v=N6JW8TQzbX8
http://www.youtube.com/watch?v=TZ8iD-Rofk8
http://www.youtube.com/watch?v=Th_wM93aF94
http://www.youtube.com/watch?v=nkRYz5Omcr0
http://www.youtube.com/watch?v=Wu3kegFFjgI
http://www.youtube.com/watch?v=qUx66S-B528
http://www.youtube.com/watch?v=shcybJnXQz0
http://www.youtube.com/watch?v=mZddP9ytnS4
http://www.youtube.com/watch?v=Or8cA5xHFbM
http://www.youtube.com/watch?v=GM1sxQQ81lg
http://www.youtube.com/watch?v=5M4q-H1t3Hs
http://www.youtube.com/watch?v=ytw6_8a5Wls
http://www.youtube.com/watch?v=dqeEg5V_IPM
http://www.youtube.com/watch?v=gZza8lZr1Oc
http://www.youtube.com/watch?v=BmqedPZZA4A
http://www.youtube.com/watch?v=lb1bEUa9WXg
http://www.youtube.com/watch?v=-6GtASYhMvo
http://www.youtube.com/watch?v=h3_8OLOhtG4
http://www.youtube.com/watch?v=ffGFIoOhN3U
http://www.youtube.com/watch?v=SzeJX57N-_I
http://www.youtube.com/watch?v=cfYnEgrVemA
http://www.youtube.com/watch?v=-o9E15BAL3o
}


require 'open-uri' 
require 'cgi'

videos.each do |video_url|        
  data = open(video_url.gsub('http://www.youtube.com/watch?v=','http://www.youtube.com/get_video_info?video_id=')).read  
  
  data_hash = CGI.parse(data)
      
  itags = CGI.parse(data_hash['url_encoded_fmt_stream_map'].first)['itag']
  
  # 22 is video code for HD quality in mp4 format
  video_mp4_url = itags.find {|tag| tag =~ /^22,/}.split("22,url=")[1]
  title = data_hash['title'].first
  # p [title, video_mp4_url]
  system %Q{wget -U "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.52 Safari/536.5" -O "#{title}.mp4" "#{video_mp4_url}"}

end

Do you happen to have o3Z3oAoKhDA? It was in https://web.archive.org/web/20160220002544/https://johannes89.wordpress.com/2014/02/09/teaching-a-computer-to-play-connect-four-using-the-minimax-algorithm/ but I can't find it.