1eres / What's The Difference Between THE UK, BRITAIN AND ENGLAND?

Task 3

Go online and find what Great Britain, the United Kingdom and the British Isles are made up of.
https://www.youtube.com/watch?v=Eizhmb_tNSk ( à partir d’1mn59) « What’s the difference between UK, Great Britain and England ? »
Great Britain =
The UK=
British Isles =
The commonwealth =

What is a complicated issue for the British ?