ByteDance Ltd. is readying an AI model geared for real-time spatial video generation, taking on Meta Platforms Inc. and Alphabet Inc. in an arena with applications in robotics and autonomous systems.Founder Zhang Yiming is personally overseeing the development of a new model slated for launch as soon as next month, according to people familiar with the matter. The billionaire has been coordinating the efforts of business units across the company and throwing AI resources and computing capacity b...