Hey, have you seen the latest Mumford & Sons video? It's a daguerreotype flip book. Oh, haha, I kid. As do the musical comedy group The Key of Awesome, who have brought us today's YouTube Comedy Week selection. If you've ever wanted do start a Mumford band -- and what 19th century hobo or little boy with a pan and a pair of salad tongs hasn't? -- then this video is for you.