Select Code to Download

use warnings;
use strict;
...
if ( my @arr = ($line) =~ m/itag=(.+?)&url=(.+?=large)/ig ) {
    print join "\n" => @arr;
}

44
http://o-o---preferred---sn-u5a3u5a3-h5oe---v13---lscache3.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=cp%2Cid%2Cip%2Cipbits%2Citag
+%2Cratebypass%2Csource%2Cupn%2Cexpire&fexp=927101%2C923006%2C922401%2
+C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C919351%2C92510
+9%2C919003%2C920201%2C912706&key=yt1&expire=1348823962&itag=44&ipbits
+=8&sver=3&ratebypass=yes&mt=1348800611&ip=92.22.37.231&mv=m&source=yo
+utube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b
+939cd6&type=video/webm;+codecs="vp8.0,+vorbis"&fallback_host=tc.v13.c
+ache3.c.youtube.com&sig=8353F6329CDA8168C4F7F29E20F2AE3F6509D85F.C582
+D63C02534232CE8E28D5ADC5B119AAEF2963&quality=large
35
http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Ccp%2Cfac
+tor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927101%2C9
+23006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%
+2C919351%2C925109%2C919003%2C920201%2C912706&expire=1348823962&algori
+thm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&key=yt1&m
+t=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp=U0hTTV
+hNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/x-f
+lv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D80E7801
+77E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&quality
+=large

 my %hash_contain;
  
...
    ...
   %hash_contain = @arr;
  }

  35 => ...,
  44 => ...,