This video provides documentation of our lesson recording system at ITP.
Here are some additional notes and links.
Intensity Pro BlackMagic cards: blackmagicdesign.com/products/intensity/
Cameras: we used Canon 5Ds which is a bit insane. I probably would not pick these again. They turn off after 30 minutes and we had to hack them a bit so that they would act as capture devices. Still, they did afford us some advantages in terms of getting a very high quality shot of the whiteboard.
Audio and Lighting: these are very important, maybe the most important. We used a lav mic and a bunch of lights. We could probably do better.
Looking at the camera: It's very hard to remember to look at the camera and I found my eyes always glued to whatever screen might be near. So I had to turn off any screens in my office as well as tape pictures of people's faces above the cameras. Having monitors above the camera would probably be best.
If you have questions, ideas, suggestions, etc please leave them in the comments below!