Aftermath of Israeli airstrike in Gaza, injured in hospital; day pix

The transcript consists of a brief mention of Yahoo followed by a greeting.

What do you think the phrase 'What? Yahoo.' conveys in terms of emotion or context?

What might be the significance of the exclamation 'Yahoo.' in a dialogue?

In what situations do you think someone would say 'What?' followed by 'Yahoo.'?

How would you interpret the greeting 'Hello.' in a conversation?

What are some possible responses to the greeting 'Hello.'?