YouTube WP Embed

<?php
    if ( has_post_thumbnail() ) {
        //the_post_thumbnail();
        $size = "large";
        the_post_thumbnail( $size, $attr );
    }
    /* Youtube URL */
    $youtubeurl = types_render_field("youtube-url",array("output"=>"raw"));
    $youtube_id = _get_video_id($youtubeurl);
?>

<iframe width="640" height="480" src="//www.youtube.com/embed/<?=$youtube_id?>" frameborder="0" allowfullscreen></iframe>