Greek Theater: https://ed.ted.com/lessons/the-battle-of-the-greek-tragedies-melanie-sirof
Medieval Theater : https://ed.ted.com/lessons/the-emergence-of-drama-as-a-literary-art-mindy-ploeckelmann
Commedia Del Arte: https://www.youtube.com/watch?v=mqlfTG40RUI
The World of Commedia: https://www.youtube.com/watch?v=h_0TAXWt8hY