An in-depth report last month looked at climate disinformation online and found that YouTube was spreading videos through its recommendation, or watch next, algorithms. Many of these videos are slick and professional, making them seem credible. Not only are these videos popping up to the top of recommended queues of YouTube’s billions of users, but they’re wrapped in regular ads from big-name companies who are unwittingly funding this disinformation. Jack Stewart spoke with David Roberts of Vox about the problems YouTube faces in deciding how to police these videos.