This video, https://www.youtube.com/watch?v=Q8U3-6VxPWo&list=PLSjtLzqIlLSUD7E2t-PhOQtG06DKdrHhk&index=3, can also be seen at https://www.youtube.com/playlist?list=PLSjtLzqIlLSUD7E2t-PhOQtG06DKdrHhk.