How to Display a Thumbnail from a Youtube Using a Shortcode

If you want to display youtube video thumbnail on your website or WordPress blog, below is the code that you can use to do it. First, you need to create a shortcode by copying the code below and paste it into your functions.php file.

/*
    Shortcode to display youtube thumbnail on your wordpress blog.
    Usage:
    [youtube_thumb id="VIDEO_ID" img="0" align="left"]
    VIDEO_ID= Youtube video id
    img=0,1,2 or 3
    align= left,right,center
*/
function wp_youtube_video_thumbnail($atts) {
     extract(shortcode_atts(array(
          'id' => '',
          'img' => '0',
          'align'=>'left'
     ), $atts));
    $align_class='align'.$align;
    return '<img src="<a href="http://img.youtube.com/vi/'.$id.'/'.$img.'.jpg&quot" rel="nofollow">http://img.youtube.com/vi/'.$id.'/'.$img.'.jpg&quot</a>; alt="" />';
}
add_shortcode('youtube_thumb', 'wp_youtube_video_thumbnail');

[youtube_thumb id="rNWeBVBqo2c" img="0" align="center"]