This video, https://www.youtube.com/watch?v=ivKTIt2QxcM&list=PLyMf_3FFEgiRZQHNzFFlK8eWmDBPQmGqP&index=4, can also be seen at https://www.youtube.com/playlist?list=PLyMf_3FFEgiRZQHNzFFlK8eWmDBPQmGqP.