Moodletutorials.org, a project by a talented developer named Rowan Chakoumakos, is a site dedicated to Moodle videos and training for teachers using Moodle.
The site launched in mid-2008 and continues to grow (albeit more slowly than it’s initial torrent of uploads). Regardless, Moodletutorials.org is a great place to start if you’re looking for training videos focused on Moodle. There are currently over 40 videos including this one which focuses on the development of multiple choice questions using the Aiken format: