This video, https://www.youtube.com/watch?v=qwhY7WAXcf0&list=PLyMf_3FFEgiQi-BzT7Qg9NKLrR_strcWy&index=3, can also be seen at https://www.youtube.com/playlist?list=PLyMf_3FFEgiQi-BzT7Qg9NKLrR_strcWy.