Love Duet from Madama Butterfly
Life of Lorraine Hansberry -- obnoxious soundtrack and many misspellings but quick and informative
August Wilson - American playwright - Fences and Ma Rainey's Black Bottom and The Piano Lesson
Slide show on essential information about August Wilson
Indonesian theater:
Legong (Bali Ubud Legong)
Greek drama:
Antigone an introduction to the National Theater version
Greek theater  - the British view
Mystery Cycles (York 2012)
Characters of Commedia (not all in English but you will get it)
Clips from One Man, Two Guvnors
Cal Performances Excellent Study Guide for Commedia Dell'Arte and One Servant, Two Masters
Renaissance theaters
Shakespeare's Globe - as re-enacted at the beginning of Henry V
China:
Gao Xingjian's The Other Shore
UNESCO 9-minute introduction to Peking Opera
Japan:
Kabuki Theater - short UNESCO video
British Theater
American theater
Street Theater by Occupy Chicago (only watch first minute if you don't
want to hear offensive language)
San Francisco Mime Troupe in 9 minutes
Teatro Campesino and Luis Valdez
This Is Us! - Luis Valdez
Barber's Entrance - Zarzuela performed in Napa, CA
The Carpa Show a modern one in English
Father-Son relationship in Death of a Salesman
10 Things to Know about Salesman
Willy tries to stop being a traveling salesman
Chinese Theater AND M. Butterfly
Print interview with David Henry Hwang
Great interview with David Henry Hwang
Theater of the Absurd
Scenes from Waiting for Godot
Trailer for Rhinoceros