As of 9:30 pm Central, on the stream linked below found by justcrazylove, you can access clips or full vids of Haim doing Gypsy, One Republic doing Everywhere, Jared Leto and the choir doing NGBA, Miley Cyrus doing Landslide, and Fleetwood Mac performing The Chain with Harry Styles (although I couldn't make him out). That's all I know.
https://www.pscp.tv/w/1eaKbqaWqZnxX?q=the+new+nine