This is Lawrence’s speech from 23C3 about the differences and similarities of code and culture (75 min). Part of it is a very good introduction to the various Creative Commons licenses, and an explanation why they exist. You will also have a good laugh at some demo videos he presented to “strengthen” his points.
Lawrence recently also gave an interview to the “Elektrischer Reporter”, a great German video blog / podcast produced by Mario Sixtus. This is a two-part interview with a short introduction in German. The interview itself is English audio with German subtitles.
In the first part Lawrence gives a very insightful explanation of why current copyright law is problematic for the way we consume and create culture today (15 min):

In the second part Lawrence explains the changes big media have to face due to the fact that more and more content creators start publishing their own content (15 min):

If you use current technology like the internet to consume culture (read blogs, download music or videos) or if you even publish your own material, these videos are for you. After watching them, you will have a good understanding of what’s the problem with copyright, and what options are available today for you to fix it.