This free module will allow you to display the videos of a specific YouTube user. Features include: Automatically updating XML feed from YouTube. Lightbox(Shadowbox) video display! User specified number of videos to display. User defined horizontal/vertical layout. User defined thumbnail and video size.

Read more at: http://extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,4654/Itemid,35/