<?php
$objKeywords = "r10.net";
$objURL = "http://gdata.youtube.com/feeds/videos?q=$objKeywords";
$objXml = simplexml_load_file($objURL);
print_r($objXml);
foreach ($objXml->entry as $objVideo) {

$objTitle = $objVideo->title;

echo $objTitle."<hr>";

}
?>

ufak bir örnek