Latest situation on China's border with NKorea

What do you think the speaker is expressing with the word 'yeah'?

How might the tone of the speaker be interpreted from the text provided?

In what context do you think the word 'yeah' is used in this text?

What emotions or reactions could the word 'yeah' convey in a conversation?

Can you provide an example of a situation where 'yeah' might be an appropriate response?