The mentioned video contains extensive knowledge about the fetal membrane known as chorion. TIMELINE: 0:14 Overview of the chorion 1:01 Chorion frondosum formation 1:36 Chorion laeve formation 3:12 Decidua Basalis 3:30 Parts of decidua 5:21 Location of decidua 5:25 Contents of decidua 5:49 Location of decidua capsularis 5:55 Location of decidua parietalis 6:05 Amniochorionic membrane