This video, https://www.youtube.com/watch?v=1ohfVwCSLL8&t=4s&index=1&list=PLxy8-Mf8v0Uf8Ih6B1Z-FOIG7P-sIWdE7, can also be seen at https://www.youtube.com/playlist?list=PLxy8-Mf8v0Uf8Ih6B1Z-FOIG7P-sIWdE7&disable_polymer=true.