download video from youtube subscription

youtube_download.rb

# download video from youtube subscription
# depends: youtube-dl
# OS: windows

require 'open-uri'
require 'hpricot'

USERNAME = ''
YOUTUBE_DL_PATH = "python C:\\programs\\Video\\youtube\\youtube-dl\\youtube-dl.py"
YOUTUBE_DL_PARAMS = "--retries=30 --max-quality=22 -c -i -w"

feed = Hpricot(open("http://gdata.youtube.com/feeds/base/users/#{USERNAME}/newsubscriptionvideos"))

already_loaded = []
already_loaded = IO.read('.youtube.dat').split("\n") if File.exist?('.youtube.dat')

feed.search('entry').reverse.each do |entry|
  video_id = entry.at('id').inner_html
  video_id =~ /([a-z0-9_-]+)$/i
  video_id = $1
  
  next if already_loaded.include?(video_id)
  
  video_url = "http://www.youtube.com/watch?v=#{video_id}"
  puts "download #{video_url}"
  title_format = entry.at('title').inner_html.include?(':') ? 'stitle' : 'title'
  command = %{#{YOUTUBE_DL_PATH} #{YOUTUBE_DL_PARAMS} --output="%(upload_date)s %(#{title_format})s-%(id)s.%(ext)s" #{video_url}}
  system %(start /MIN #{command})
    
  already_loaded.unshift(video_id)
end

already_loaded = already_loaded[0, 100] # keep last 100
open('.youtube.dat', 'w'){|f| f.write already_loaded.join("\n") }