This video, https://www.youtube.com/watch?v=bNk_-cYjFLM&index=5&list=PLev47CtHdcCuctbOa8cWfIjZtHs8l5vnl, can also be seen at https://www.youtube.com/playlist?list=PLev47CtHdcCuctbOa8cWfIjZtHs8l5vnl.