I Prefer One With Aluminum Siding or Aluminum, if You Will

So he means that the sides of the wading pool should be made of aluminum. But he says aluminum siding or aluminum, if you will. That's because between American English and British English, they pronounce the words differently. So in Canada or in America, they'd say aluminum. And in Britain, we'd say aluminium. It's just another way of saying if you like, or if that's how you say it.