On Saturday, NewsHour Weekend explores the short-term housing rental industry giant, Airbnb, which now lists more than 1 million rooms available in 190 countries. The platform's largest market is in New York City, with more than 25,000 listings per night, and it's also where the debate over how to regulate short-term rentals is the most contentious. And in light of a report by the New York Attorney General that says nearly three-quarters of Airbnb's listings in the city were technically illegal, New York City is cracking down. Hari Sreenivasan reports.