Samuel Boivin | Nurphoto | Getty ImagesOpenAI launched short-form video app Sora this week, and users have flooded the platform with artificial intelligence-generated clips of popular brands and animated characters.The startup could soon face a deluge of copyright lawsuits, experts told CNBC."A lot of the videos that people are going to generate of these cartoon characters are going to infringe copyright," Mark Lemley, a professor at Stanford Law School, said in an interview. "OpenAI is opening itself up to ...