title: How to get the URL of a youtube video to download it?
body: <p>I want download this video on my PC ( also in HD format ): <a href="http://www.youtube.com/watch?v=d4RiUy23e9s" rel="noreferrer">http://www.youtube.com/watch?v=d4RiUy23e9s</a></p>
  
  <p>So I want the URL of the .flv, .avi, .mp4 or whatever to download it with wget or other download manager.
  How can I do this ?</p>
  
  <p>I don't want get the url throught programs o webtools like keepvids.</p>