Contentful, a popular headless content management system (CMS), has integrated with Mux, allowing users to easily add video content. With the new extension, users can install the Mux API keys and add the Mux component to their content model. Once a video is added, it will be uploaded to the user's Mux account for transcoding and playbackId retrieval. The integration streamlines the process of incorporating video content into headless CMS platforms.