function get_youtube_screen( $url = '', $type = 'default', $echo = true ) {
    if( empty( $url ) )
        return false;

    if( !isset( $type ) )
        $type = '';

    $url = esc_url( $url );

    preg_match("|[\\?&]v=([^&#]*)|",$url,$vid_id);

    if( !isset( $vid_id[1] ) )
        return false;

    $img_server_num =  'i'. rand(1,4);

    switch( $type ) {
        case 'large':
            $img = "<img src=\"http://{$img_server_num}.ytimg.com/vi/{$vid_id[1]}/0.jpg\" />";
            break;
        case 'first':
            // Thumbnail of the first frame
            $img = "<img src=\"http://{$img_server_num}.ytimg.com/vi/{$vid_id[1]}/1.jpg\" />";
            break;
        case 'small':
            // Thumbnail of a later frame(i'm not sure how they determine this)
            $img = "<img src=\"http://{$img_server_num}.ytimg.com/vi/{$vid_id[1]}/2.jpg\" />";
            break;
        case 'default':
        case '':
        default:
            $img = "<img src=\"http://{$img_server_num}.ytimg.com/vi/{$vid_id[1]}/default.jpg\" />";
            break;
    }
    if( $echo )
        echo $img;
    else
        return $img;

}