Locals write messages on memorial wall

The video tutorial begins with an introduction to the topic, followed by affirmative responses.

What do you think the speaker means by 'it.'?

How does the context of the conversation affect the meaning of 'it.'?

Why do you think the speaker repeated 'Yes.'?

What emotions might be conveyed by the phrase 'Yes. Yes.'?

What could be the significance of the duration of the responses given?