Thanks for getting back to me.
Iâ€™m not sure exactly what you mean by source, but I can tell you I have explored the cd and there are many folders containing different lessons, there is an intro and then the lesson which is a screen recording using camtasia studio. The type of file is Video Clip with an extension AVI.
As far as I know the codec used is TechSmith.
Sorry if this sounds ignorant but this is all new to me !!