How do you record your lectures? While reading this question, and specifically Chris Gregg's answer, I started to think about recording my lectures in order to help students review, help students who missed class, and generally provide a way for people to learn about the subjects I teach.

So, how do teachers (with the same goal as I wrote) record their lectures? Do they simply ask someone to record them with a video camera? Do they go in and do more serious editing like you see in Coursera videos where the video transitions between the lecturer's face and slides being drawn on by the lecturer (as described here)? 

I'm curious what my options are, considering my university provides zero support for this idea of recording lectures.
If my lecture is done via a presentation (not my preferred method, but necessary for some classes), I record the audio of my lectures along with a "video" of the slides I use. I use Camtasia to record everything, so the only other thing I need is a microphone. 

When I give lectures at the blackboard I don't record them. However, for those lectures I provide a fairly detailed set of course notes.