Nah Yung Suk, a seasoned producer whose latest hit is the Amazon Prime Video reality series “Jinny’s Kitchen,” talks about the growth of South Korea’s TV and film industry and the globalization that is energizing the content business. In Korea, the new dynamism in the marketplace can be defined as “before Netflix” and “after Netflix,” he explains. The producer affiliated with Korea’s CJ ENM also weighs in on his experience with having his hit unscripted format “Grandpa Over Flowers” adapted by NBC as 2016’s “Better Late Than Never.”