Christopher if I might suggest it circumspect to pin this thread?

It not only answers [u]an increasingly common enquiry[/u] as to why there are two courses, but also clarifies why the previous older one remains.

As you point out, they two offer different approaches.

The older one (yours) may be of lesser video quality, but personally I found/find considerable benefit and enjoyment in its comprehensive attention to detail and different structural approach. I'd like to see both remain as they currently are so people can choose the path/method which is the better fit for them.