YouTube has announced new experimental features for its Premium users, including high-quality audio streaming at up to 256kbps and mobile playback speeds of up to 4x. Users can now enjoy the 'Jump Ahead' feature on the web, allowing them to skip to key video moments identified by AI. Additionally, iOS users will soon be able to access picture-in-picture for Shorts and smart downloads for offline viewing. YouTube Music is also expanding its 'Ask Music' feature to the U.K. and Ireland, allowing for personalized music recommendations.