No one knew what was going on. It was late September, just days before OpenAI rolled out a new social media app for its video generator, Sora, and whispers were swirling of changes that would undercut Hollywood. A major talent agency, which learned of the upcoming news through the grapevine, wondered why its C-suite hadn’t heard from the Sam Altman-led start-up yet, according to an agency exec involved with the talks. The talent firm reached out. The first round of talks between the two sides wa...