YouTube stars Rhett McLaughlin and Link Neal pull back the curtain at some of the most popular fast-casual chains in the United States. For over a decade, the two childhood friends from Buise Creek, N.C., have shared food-related videos with more than 17 million subscribers on "Good Mythical Morning." Now McLaughlin and Neal are taking their adventurous personalities from the computer screen to the small screen. The dynamic duo give a behind-the-scenes look at popular food brands and restaurant chains.