Seen it and it’s good. He’s speaking to young people who are off camera. Puts a little comedic affect in it.
As you say, points out that the UK is only 2% of global emissions and that if it sunk into the ocean, it wouldn’t make a difference. He also points out the obvious, that China/India are the largest producers and that they’re poor and you’re not going to get poor people to stop trying to become less poor and definitely not going to get them to become poorer. Same with Central/South America.
He doesn’t try to say climate change is a hoax because they would stop listening right there. He tells them they need to quit throwing food on paintings and need to educate themselves and innovate new technologies like former generations.
It is interesting that he didn’t mention Africa.