Stand-up Sean Patton is the subject of the latest episode of Scott Moran’s documentary web series “Modern Comedian,†which is now produced by PBS. In his “Modern Comedian†installment, Patton leads us on a tour through America’s two biggest cities (and two biggest comedy cities), L.A. and New York. Sean Patton seems to like New York a hell of a lot better than L.A., that’s for sure.