AI video startup Runway said on Thursday it had raised $308 million in a new funding round, led by private equity firm General Atlantic, to expand its new media ecosystem. The latest funding round valued the New York-based company at over $3 billion, according to people familiar with the matter, but Runway declined to comment on the valuation. With the latest fundraise, the startup plans to develop AI research for new media focusing on its AI film and animation studio using world simulators. A