Parse YouTube video source file urls from URL id

youtube-video-source-file-parser.rb

# Download Videos from Youtube in Ruby
# By: Sheharyar Naseer

require 'open-uri'
require 'cgi'

def tube(id)
  'http://youtube.com/get_video_info?video_id=' + id
end

def get_video_data(id)
  CGI.parse open(tube(id)).read
end

def get_video_streams(id)
  streams = get_video_data(id)['url_encoded_fmt_stream_map'].first.split(',')
  streams.map do |s|
    x = CGI.parse s
    x.each do |k,v|
      if k == 'type'
        x[k] = v.first.split('; ')
      else
        x[k] = v.first
      end
    end
  end
end


# Get Videos

video_id = "THE_VIDEO_ID"
streams  = get_video_streams(video_id)

puts "### Total #{streams.count} streams available:\n\n"
streams.each_with_index do |s,i|
  puts "Stream #{i+1}",
       "-------------",
       "Quality: #{s['quality']}",
       "Type: #{s['type'].first}",
       "URL:  #{s['url']}\n\n"
end

puts "(Modify the code to get full urls)"