Here to stay: Airbnb co-founder on regulation, growth and overtourism

Every two minutes, 400 guests check into a property on Airbnb. They have a choice of over four million of them around the world. But city authorities have been toughening restrictions on the website amid complaints from hoteliers as well as residents who believe holiday rentals are fuelling property speculation. Stephen Carroll talks to Nathan Blecharczyk, the company's co-founder and chief strategy officer, on the sidelines of the OECD's annual summit in Paris.