This site is about learning: Especially learning using Drawing and Sketching (and see my free downloadable book at: http://pdheid.blog). To learn these topics, I'll tell you what works for my students: Make your own sketches from the videos, and practice redrawing the sketches while thinking about the topics. My students learn more, and they learn faster, when they practice their own sketches. These videos contain essential information for problem solving in the courses I teach...
