Look around the subway in Beijing or Shanghai and maybe nine of 10 passengers are watching videos on their mobile devices. Chances are most of them are watching content delivered to them by Youku Tudou. The country’s leading Internet television operator streams 400 million videos a day. In that sense, Youku is Netflix and YouTube – plus Comcast and Liberty Media – stuffed into one dumpling. It is also the nexus for Hollywood’s high hopes in the Middle Kingdom.