CongBom

To get meta value in front-end, use <code>get_post_meta()</code> with meta key is <code>youtube_id</code>.
Example:
Print YouTube video ID: 
 ID, ‘youtube_id’, true);?>
Thumbnails: 
 <img src="http://img.youtube.com/vi/ID, ‘youtube_id’, true);?>/mqdefault.jpg” alt=”” />
Video player:
<iframe src="http://www.youtube.com/embed/ID, ‘youtube_id’, true); ?>” width=”588″ height=”331″ frameborder=”0″ allowfullscreen>

YouTube metabox

Create YouTube meta-box for post with live preview

YouTube metabox vs Ocean Extra