Todd Spangler NY Digital EditorHow much would you pay to have an intimate video-conferencing session with Madonna, Amy Schumer, Laura Dern, Jennifer Lopez or Judd Apatow?Bright, a startup founded by investor and music manager Guy Oseary (whose clients include Madonna and U2) and former YouTube exec Michael Powers, is going to test the market for live, ticketed events hosted by celebrities, music artists and creators.Launching Tuesday, Bright (brightlive.com) is built on top of the Zoom Video