I am glad to hear the videos were helpful. I did have plans to create some tutorials on functions. In fact, the premise behind the msgbox function series is to act as an introduction to functions and methods. However, there are some other things that should be addressed before building fancy functions.
I started with a rough draft on a series for debugging. I would like to create a series on debugging and functions. Right now, I am still undecided on what software and equipment to use for the screencasts. The one I used was great for maintaining fidelity and, at the same time, keeping the files size reasonable. That software is now deprecated and I am at a crossroads.
I know it does not need to be perfect, but I would like to have a system that will work into the future and generate a good product.