Kuaishou just lit the fuse on one of the biggest AI startup spin-offs in history. The Chinese short-video giant filed with the Hong Kong Stock Exchange to spin out Kling AI — its AI video generation business — into an independent company called Beijing Keling Intelligent Technology Co., Ltd., backed by a funding round of up to $3 billion at an $18 billion post-money valuation. That makes it the largest fundraising round ever by an AI video generation firm globally. The...