Moon Bear Sanctuary in China

The video tutorial briefly introduces a topic and emphasizes the importance of repetition.

What does the speaker mean by 'He's just going to come back back.'?

How does the repetition of the word 'back' affect the meaning of the statement?

In what context might someone say 'He's just going to come back back.'?

What emotions might be conveyed by the phrase 'No no.'?

What could be the reason for the speaker to say 'No no.'?