Last week, we featured the video “Why Flying Is So Expensive,” recommended to us by reader Jon R. Another video in the same series from Wendoverproductions is called “How Budget Airlines Work,” and the subject is just what it sounds like—and it’s pretty comprehensive. Just like its sister video, it’s rather long (eight minutes) and boring, but it’s also full of all kinds of interesting info that you might not know, like how budget airlines, especially in Europe, make so much more money than legacy carriers.