San Francisco: Facebook said on Wednesday that it plans to redesign how people watch videos on the world’s largest social network and it announced plans for a slate of new exclusive shows covering subjects such as sports, travel and cooking. Facebook said it would call the video platform “Watch” and would make it available initially to people in the United States using the network’s mobile app, website and television apps. The world’s largest social network added a video tab last year, and it has been dropping hints for months that it wanted to become a source of original and well-produced videos, rather than just shows made by users.