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

PureDevs

ympervej86

Have you ever wanted to inspect the metadata associated with a post? 
PureDevs Any Meta Inspector is a free, lightweight plugin that allows you to — 
Inspect meta keys of posts, pages, custom post type posts, custom taxonomy terms, users and comments 
Inspect unserialized values of posts, pages, custom post type posts, custom taxonomy terms, users and comments

PureDevs Any Meta Inspector


The plugin is excellent, it helps me a lot in development because I exclusively deal with theme and plugin programming. Keep it up!


Great plugin!

PureDevs Any Meta Inspector shows all the meta keys and their unserialized values in a metabox for posts, pages, terms, comments, and users.

YouTube metabox vs PureDevs Any Meta Inspector