AP pix filmed at Chinese side of border with NKorea

The video provides a brief introduction to the topic, affirming understanding with a simple phrase.

What does the phrase 'yes, of course' imply in a conversation?

In what contexts might someone use the phrase 'yes, of course'?

How can the tone of voice affect the meaning of 'yes, of course'?

What are some alternative phrases that convey a similar meaning to 'yes, of course'?

Can 'yes, of course' be used sarcastically? Provide an example.