This video is a talk held in December 2008 at the 25th Chaos Communication Congress, under the title Nothing to hide.
It is a crash course in full disk encryption concepts, products and implementation aspects. An overview of both commercial and open-source offerings for Windows, Linux, and MacOS X is given. A programmer’s look at the open-source solutions concludes the presentation.
If you are not encrypting your whole hard disk remember that opening and viewing files will leave recoverable traces in your operating system. If you care about privacy you should be using full disk encryption, Truecrypt is the way to go in Windows.
Click this link to download the crash course in full disk encryption papers.
I would say this is a video for intermediate/advanced computer users.