Burbank post-production company Atlas Digital has partnered with Hollywood-based Runway Inc. to share editing systems, staff and other resources, the companies announced Thursday. Together, the companies will share 530 editing rooms in Santa Monica, Hollywood, Universal City and Burbank. The companies said the partnership will help content creators meet the growing demand for streaming video worldwide. “The Atlas/Runway partnership gives all of our clients access to more human and technological resources, more geographic locations and a wealth of knowledge based on the diverse experiences of the entire staff,” Atlas Chief Executive Shawn Sanbar said in a statement. Atlas and Runway will continue to operate as separate companies.