This video posted by Gareth Barnard and created with Gource shows an animated representation of the entirety of Moodle’s development (from the first logs through this past February). The videos gives live to the development and introduction of various features and shows the rapid acceleration of participation and development overtime as well.
I found it mesmerizing and pretty to watch. Find the original post here: https://moodle.org/mod/forum/discuss.php?d=223780
Direct video link: http://youtu.be/xzz_38Ch-iU