Picture this: You’re in the Hogwarts library. Rain falls outside, a fire crackles across the room, and somewhere offscreen, quills scribble on parchment. You might look up from time to time to see a book drifting through the air or stepladders moving around on their own. Or maybe, you’ll feel so relaxed, you nod off to sleep. Welcome to the world of so-called ambience videos, a genre of YouTube video that pairs relaxing soundscapes with animated scenery in order to make viewers feel immersed in specific spaces, like a jazz bar in Paris or a swamp populated with trilling wildlife. They are part of a long tradition of audiovisual products and programming designed to make a space feel a little more relaxing, a little nicer. Consider the black-and-white footage of a crackling yule log that the New York television channel WPIX debuted on Christmas Eve 1966 — grandfather to the many digital yule logs available today — or the rise of white noise machines that fill a room with the sound of crashing waves, chirping crickets or falling rain. But recently, this genre of video has attracted new fans who want to be transported beyond the same four walls they’ve been staring at for the better part of a year. […] Ambience videos provide a respite from the “hypermediacy” of the internet, she said — a break from the constant bombardment of ads and emails and the self-inflicted burden of dozens of open browser tabs. (Hypermediacy can be defined as the act of viewing, consuming or interacting with multiple forms of media at once.) Paradoxically, a person has to wade through YouTube’s buffet of suggested videos just to locate an ambience video that will shut out the world.