It was inevitable that John Oliver would do a segment on the EU referendum. Here it is:
In it, Oliver makes a case for Britain to stay in the European Union, using the opportunity to make digs at UKIP, the claim by pro-Brexit supporters that Britain gives £350 million gives to the EU each week, and the claim that the EU imposes ridiculous regulations.
He says the word "Brexit" doesn't sound scary.

And that the rest of the world doesn't care about it.

But how dreadful it is to be in Britain right now.

And here's his reasoning for Britain to stay in the EU.
