In this video featuring Hank Green, we get a brief introduction to the Divine Command Theory — the idea that morality comes from God.
It also discusses the Euthyphro dilemma, which asks whether things are good because God said so, or if God says things are good because they really are.
If that sounds dry, trust me, the video is entertaining and educational:
If any moments stand out to you, please leave a timestamp and summary in the comments below!
(via CrashCourse. Thanks to Ed for the link)