"Applying the fair use doctrine to AI is not only a matter of American competitiveness — it’s a matter of national security," OpenAI argued in March. Without this step, it said at the time, U.S. AI companies would lose their edge over rivals in China. OpenAI officials said it put measures in place to block people from creating videos of public figures or other users of the app without permission. Public figures and others’ likeness cannot be used until they upload their own AI-generated video and give their permission. One such step is a "liveness check" where the app prompts a user to move their head in different directions and recite a random string of numbers. Users will be able...