Many new members seem to have difficulty getting a YouTube video loaded.
Most of the time you are simply using the wrong code, you have probably put the entire link between the YouTube brackets.
You just have to use the code from the YouTube URL in your browser.
Say, for example, you would like to embed a video with the link:
http://youtube.com/watch?v=JFwCCL0Vh6U
Usage (but without the spaces):
[ youtube ]value[/ youtube ]
Given our example this means (but without the spaces):
[ youtube ]JFwCCL0Vh6U[ /youtube ]
So just use the number behind ‘v=‘