The Miami Heat allegedly posted then unlisted a "LeBron James Introductory Press Conference" livestream on their official YouTube account as theories fly.
https://www.foxnews.com/outkick-sports/miami-heat-post-unlist-youtube-livestream-lebron-introductory-press-conference
https://www.foxnews.com/outkick-sports/miami-heat-post-unlist-youtube-livestream-lebron-introductory-press-conference