NGL between the title and language of this article and the title of the related articles I saw at the bottom of the page, futurism.com is cringe as fuck. It's bad that she didn't answer and the way she gave her non-answer was bad, but I don't need a website to interpret the video for me.
The original source at the WSJ is much cleaner, and whatever else you might think about their site/content/agenda, at least it was a pretty squeaky description of what's going on in the video:
Sora, OpenAI’s new text-to-video AI model, can create realistic scenes. In an exclusive interview, WSJ’s Joanna Stern sat down with the company’s CTO, Mira Murati, who explained how it works but ducked questions about how the model was trained.