Here at last are the videos I've been promising ! The names of the videos are self explanatory. They are all in a Windows format (.wmv). They will run in Linux and Windows.
To see details, I would max the viewing size of the screen and then viewing will be a pleasure. Let me know whether these help you or not. Also let me know if you can think of any other subjects that would be helpful.
To view each video, click on the text in the name and the video will play.