Mike Mullen, Chairman of Joint Chiefs meets SKo counterpart

The video begins with a casual and friendly greeting, setting a relaxed tone for the content.

What does the phrase 'Yeah buddy' imply in a conversation?

In what contexts might someone use the phrase 'Yeah buddy'?

How can the tone of voice affect the meaning of 'Yeah buddy'?

What emotions might be conveyed by saying 'Yeah buddy'?

Can 'Yeah buddy' be used in formal settings? Why or why not?