YouTube Videos Module is based on Daniel Hensby's post at SSbits. It adds a shortcode for inserting YouTube videos to pages, as well as adding a button to the TinyMCE WYSIWYG editor.
SilverStripe 2.4 or newer.
Copy the 'youtubevideos' folder to your the root of your SilverStripe installation.
[YouTube id=4af1bFh3duo width=300 height=150 related=0]blah[/YouTube]