Queen Elizabeth & Prince William in Scotland for Royal week official visit

The video provides a brief introduction to a topic, with a concise statement 'Not really.'

What do you think the phrase 'Not really' implies in a conversation?

In what contexts might someone respond with 'Not really'?

How can the tone of voice affect the meaning of 'Not really'?

What are some alternative phrases that convey a similar meaning to 'Not really'?

Can 'Not really' be considered a polite way to decline something? Why or why not?