JANGSEONG, South Korea — The stars of the latest online trend in South Korea stay out of sight most of the day. Viewers don't seem to mind waiting for hours while nothing happens. When the stray cats finally come to eat the food left out for them, people watching online sit enraptured by their feline charms. The livestreamed "Cats Meok Bang" show is a twist on an online trend of young South Korean men and women tucking into feasts in real time, while viewers send messages and sometimes virtual cash.