This video, https://www.youtube.com/watch?v=lkDd21nWUJw&t=0s&list=PLSjtLzqIlLSUWdVCBF-E-n5jDTvoyj0GJ&index=1, can also be seen at https://www.youtube.com/playlist?list=PLSjtLzqIlLSUWdVCBF-E-n5jDTvoyj0GJ.