When MTV premiered almost 40 years ago, British ska band Madness were early stars of the fledgling network – the opening “don’t watch that, watch this!” command of their 1979 single “One Step Beyond” was even featured in MTV promos. Few acts of the era were more perfect for the music video revolution than these zany North Londoners, who saw every video shoot as an opportunity for a fancy-dress adventure. Here, their mouthpiece chats about their storied past.