Biden, Merkel, Poroshenko hold talks

The video begins with a humorous remark, followed by a request for the President to leave, and concludes with the word 'Yahoo'.

What is the significance of the phrase 'Just kidding' in the context of communication?

In what contexts might humor be used, as suggested by the phrase 'Just kidding'?

What might the term 'President' imply in a discussion or narrative?

How does the phrase 'please leave' reflect on interpersonal relationships?

What emotions or reactions could the exclamation 'Yahoo' convey in a conversation?