title: Creating Youtube downloader Plugin via javascript
body: <p>I am planning to create video downloader plugin.So basically we need signatures to download an video file from youtube.I referred other working plugins..They convert the signature to some format.</p>
  
  <p>Basically orginal signature in youtube page source is</p>
  
  <pre><code>BBB4D55F9CF4387F77958A6960CA96708C73AB59B.037D413F53291E957891898307BBF1C41B6037D77D7
  </code></pre>
  
  <p>Plugins convert the above signature to below signature.</p>
  
  <pre><code>BB4D55F9CF4787F77958A6960CA96708C73AB59B.037D413F53291E957891898307BBF1C41B6037D3
  </code></pre>
  
  <p>I want to know is these some kind of hash ? has any one came across similar hash ?</p>