At 12 mins, this is a bit long, but it's presented by a professor, so interesting in that regard. Funny, that this item does not seem to be linked from the excellent index of the Moodle videos that Chris posted here - "NJIT: Moodle: Instructor Tutorials"
It is a bit long and self-important, but it does provide a functional overview from the student perspective of several key tools: forums, email, syllabus, etc. Possibly also useful for Usability working group.