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I grouped these by subject so that you could follow the playlists (or do your own cherry picking) by subject, in order to "build" one piece of knowledge off of another. However, if you are to be the most successful, it is imperative that you learn from written pieces on this site or others that you find or that I have recommended. It is always best to follow the suggestede reading sequence.
In some cases, I've "re-ordered" the videos into a sequence such that you can just let the playlist run continuously into the next video.
Outside links break sometimes
While my links won't break, some outside links will, especially as some entities can force deletion if the videos aren't authorized.