Youtube video class for wordpress

youtube_video.php

<?php
/**
 * Obtain youtube video API object and transients it
 * eg. $video = new youtube_videos('simonscat');
 *     $video->get_videos(array('offset' => 5,'num_videos' => 10));
 * @param $account string Account youtube name 
 * @return none
 * @author Hugo Solar <contacto@hugosolar.net>
 * */

class youtube_videos {
    private static $instance;
    private $num_videos;
    public $account;
    private $cache_time;
    const data_type = 'json';
    private $api_url;
    public $data;

    public function __construct($author) {
        $this->set_api_url($author);
        $this->set_cache_time(2);
        
        if (false === get_transient('videoLoad-'.$author)) {
            $this->get_data();
            set_transient('videoLoad-'.$author,$this->data,60*60*$this->get_cache_time());
        } else {
            $this->data = get_transient( 'videoLoad-'.$author );
        }
    }
    private function set_api_url($author) {
        $this->account = $author;
        $this->api_url = 'http://gdata.youtube.com/feeds/api/videos?alt='.self::data_type.'&author='.$this->account;
    }
    private function get_api_url() {
        return $this->api_url;
    }
    private function set_cache_time($time) {
        $this->cache_time = $time;
    }
    private function get_cache_time() {
        return $this->cache_time;
    }
    private function get_data() {
        $cache_time = $this->get_cache_time();            
        $api_url = $this->get_api_url();

        $api_obj = new WP_Http;
        $api_request = $api_obj->request($this->get_api_url());
        $this->data = json_decode($api_request['body']);
        $textVideo = $this->data;
        
        return $textVideo;
    }
    public function get_videos($args=null) {        
        $s = wp_parse_args($args,array(
                'offset' => 0,
                'num_videos' => -1
            ));
        extract($s);
        $i = 0;
        
        $video_list = array();
       foreach ($this->data->feed->entry as $k => $video) {
            if ( ($k >= $offset) ) {
                if (($i < $num_videos)&&($num_videos != -1)) {                    
                    array_push($video_list, $video);
                    $i++; 
                } elseif($num_videos == -1) {                    
                    array_push($video_list, $video);
                }
                
            }
        }
        return $video_list;
    }
    function get_video_link($video) {
        return $video->link[0]->href;
    }
    function get_video_id($video) {
        return array_pop(explode('/',$video->{'id'}->{'$t'}));        
    }
    function get_video_thumb($video,$size){
        return $video->{'media$group'}->{'media$thumbnail'}[$size]->url;
    }
    function get_video_title($video){
        return $video->{'media$group'}->{'media$title'}->{'$t'};
    }
    function get_video_time($video) {
        return gmdate("H:i:s", $video->{'media$group'}->{'yt$duration'}->seconds);
    }
    function get_video_views($video) {
        return $video->{'media$group'}->{'yt$statistic'}->viewCount;
    }
    function get_video_favorites($video) {
        return $video->{'media$group'}->{'yt$statistic'}->favoriteCount;
    }
}
?>