YouTube is undergoing a mobile app interface redesign aimed at creating a more streamlined and content-centric user experience. Key changes include larger profile images next to video titles, the replacement of traditional channel names with @usernames, and action buttons (like, dislike, share, download, subscribe) now appearing as icons without text labels. The notification bell has been repositioned, and YouTube Shorts feature smaller buttons. User feedback has been mixed, with some expressing concerns about the new layout being "squished" and losing contextual information. The update is currently limited to a select group of users as YouTube gathers feedback for potential broader implementation.