'Cobra Kai' trailer is here to sweep the leg on your 'Karate Kid' nostalgia

Ralph Macchio and William Zabka are at it again.
Both stars from The Karate Kid are back in a new trailer for Cobra Kai, the upcoming YouTube Red series that's poised to make "How do I get YouTube Red?" a trending search term.
Much of the trailer focuses on Zabka's Johnny Lawrence, the one-dimensional Karate Kid antagonist who got his face got kicked in by Macchio's Daniel LaRusso at the movie's climax. Johnny fell on some hard times in the years after his teenage showdown, but now he's out to g