This video, https://www.youtube.com/watch?v=iVblTwmrJiA&index=4&list=PLUpQzSnKparipCK-81Mqlr2JQgCh0HWT_, can also be seen at https://www.youtube.com/playlist?list=PLUpQzSnKparipCK-81Mqlr2JQgCh0HWT_st=PLUpQzSnKparipCK-81Mqlr2JQgCh0HWT_.