title: How to get big facebook video thumbnail
body: <p>I'm looking for the way to get big facebook video thumbnail.
  i've found some links:</p>
  
  <p><a href="http://graph.facebook.com/1571886379501082/picture" rel="nofollow">http://graph.facebook.com/1571886379501082/picture</a>
  ~> this one retun one small thumbnail picture with size 128x128.</p>
  
  <p>and other one 
  <a href="http://graph.facebook.com/1571886379501082/thumbnails" rel="nofollow">http://graph.facebook.com/1571886379501082/thumbnails</a>
  ~> this one will return big thumbnail picture but it required access_token to get.</p>
  
  <p>is it possible to get big thumbnail video picture without login on facebook?</p>