Francois Wouts, the creator of the open-source library Preview.js, discussed how his tool allows developers to preview UI components directly within their editors, thereby reducing the feedback loop for UI modifications. Unlike Storybook, Preview.js offers this functionality without any setup, and there is a Storybook integration in development. The interview was conducted by Jay Khatri, Co-founder, Hype-man, and CEO, who aimed to highlight the advantages of using Preview.js in enhancing the efficiency of UI development workflows.