This update includes support for adding and removing captions and subtitles within the app, getting the Mux Player code, and displaying the data saved for developers. For adding content, we have added drag and drop uploading support via the Mux Uploader which can be added with the URL and Mux Asset ID. Additional goodies include a global option for audio normalization, a toggle for signed or public playback IDs per field, buttons to manually resync with Mux, separate 'remove' and 'delete' buttons, and UI improvements. Under the hood, other updates include React, UI, and testing libraries plus more graceful error handling. You can read more in the Contentful Marketplace.