The Great Dictator- Charlie Chaplin-Video Lesson

Good morning,my dear English learners!Today we are going to watch the video with Charlie Chaplin:
https://www.youtube.com/watch?v=ibVpDhW6kDQ&hl=en&persist_hl=1&gl=US

Questions:

1. Why does he start with the words "I'm sorry"?
2. Can a leader lack a desire to be an emperor?
3. What is your opinion about his speech?