This video, https://www.youtube.com/watch?v=GnAnXXhmGfc&index=5&list=PLyMf_3FFEgiQzNBH3wm8pr_9VYuzvghy7, can also be seen at https://www.youtube.com/playlist?list=PLyMf_3FFEgiQzNBH3wm8pr_9VYuzvghy7.