Získanie videa a obrázku z URL

<?php
class trieda_youtube
{
  function _ZiskajIDVideaURL($url)
  {
     $p = explode('?v=',$url);
     if(count($p) == 2)
    {
        $tmp = explode('&', $p[1]);
        if(count($tmp)>1)
      {
           return $tmp[0];
        }
      else
        {
             return $p[1];
          }
     }
    else
      {
          return $url;
       }
  }
  function UkazVideo($videoid, $sirka=425, $vyska=350)
  {
     $videoid = $this->_ZiskajIDVideaURL($videoid);
    return '<object width="'.$sirka.'" height="'.$vyska.'" type="application/x-shockwave-flash" data="http://www.youtube.com/v/'.$videoid.'"><param value="http://www.youtube.com/v/'.$videoid.'" name="movie"><p>Vas prehliadac nepodporuje flash. Stiahnite si ho na adrese <br> <a href="http://get.adobe.com/flashplayer/">http://get.adobe.com/flashplayer/</a></p></object>';
  }
  function ZiskajObr($videoid, $obrid=1)
  {
     $videoid = $this->_ZiskajIDVideaURL($videoid);
     return "http://img.youtube.com/vi/$videoid/$obrid.jpg";
  }
  function UkazObr($videoid, $obrid=1, $alt = 'Video screenshot')
  {
     return "<img src='".$this->ZiskajObr($videoid, $obrid)."' width='130' height='97' border='0' alt='".$alt."' title='".$alt."'>";
  }
}
?>