The process I finally settled on was: 1. read various books, and make notes on the topic for a particular video. 2. break the notes down into bullet points, I used the TaskPaper app, for this and highly recommend it. 3. make an intro slide and do a head shot video talking about the points in this video. I found doing this unscripted gave a more natural feel. 4. then record the content of the lecture, this in my case was a screen video of me writing code. I found that if I was talking at the sametime I made too many mistakes. 5. I then edit this content and remove the typos and errors. 6. record the voice over for the video. - this was quite slow I would use the bullet points to talk about what was happening on the screen. - I found I would record a 5/10 seconds of voice over and then position it within the video so that it would make sense. - there was a lot of editing to get the video and voice to match up nicely.
My course style evolved over a few months but I'm happy with the approach, although some of the earlier videos make me cringe a bit.
As for equipment, I bought a studio kit from amazon on black friday, http://www.amazon.co.uk/Excelvan-Photography-Continuous-Back...
I also bought a logitech C920 usb camera... not that happy with it as using a mac I also needed to change the webcam settings with another app.
Finally I used a Samson CO1U condenser mic, which was excellent: http://www.amazon.co.uk/Samson-CO1U-Pro-Microphone-Headphone...
I haven't made much money out of the videos, even though I have around 1680 students. The nature of online courses is that it is very "coupon" based and you need to constantly push and repackage it.
Would I do it again... yep... am building a new course as we speak. Good luck