full event video https://www.youtube.com/watch?v=dnnKXuYcDU0
The event had celebrity guests such as Mark Hamill, Josh Groban, Bradley Whitford, Joseph Gordon-Levitt, Sean Astin, Paul Scheer, Jeff Bridges, J.J. Abrams, maybe more
Politicians who participated were Pete Buttigieg, Roy Cooper, JB Pritzer, and Tim Walz.
They had a twitter account but it is mysteriously banned.
https://www.youtube.com/watch?v=oqiOeiG4VNo
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: