Warning file_get_contents () failed to open stream: HTTP request failed! HTTP/1.0 402 Payment Required

PHP Snippet 1:

function http_get_contents($url)
{
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_TIMEOUT, 1);
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  if (FALSE === ($retval = curl_exec($ch))) {
    echo curl_error($ch);
  } else {
    return $retval;
  }
}

$request_url = 'http://gdata.youtube.com/feeds/api/videos/SD3S27fMGzc';
$result = http_get_contents($request_url);

$simpleXML = new SimpleXMLElement($result);

print_r($simpleXML);