This video, https://www.youtube.com/watch?v=gVYHN_a_s3E&list=PLSjtLzqIlLSVajc5FQKUx-5Op6mrvPNdG&index=3&t=0s, can also be seen at https://www.youtube.com/playlist?list=PLSjtLzqIlLSVajc5FQKUx-5Op6mrvPNdG.