YouTube is not the only resource to find online course material.
MERLOT – http://www.merlot.org
A learning objects repository for many disciplines that features content submitted by teachers and faculty from across the world. Submissions are peer-reviewed and also user rated.
Open Courseware Consortium – http://www.ocwconsortium.org
This directory provides links to open courseware projects at colleges and universities across the world.
What is a MOOC? http://youtu.be/eW3gMGqcZQc