Iranian dissidents protest outside UN Sec council FMs meeting's venue

The video begins with a series of greetings, setting a friendly tone. It concludes with a motivational prompt encouraging viewers to proceed.

What do you think the speaker means by 'No. Hey hey hey.'?

How does the tone of the speaker change throughout the dialogue?

What emotions do you think the speaker is expressing in this dialogue?

Why do you think the speaker repeats 'No.'?

What could be the context behind the phrase 'Now come on.'?