I am another of those that was caught in a whirlpool while trying to watch the replay. I tried in both Safari and Chrome, with and without ad-blockers, registered and not-registered, and never got the “replay” button. Then I scrolled all the way down this thread and found the Catch-22: you have to have already been registered. I await the posting of the video recordings on YouTube (or Coda’s site).
It would be helpful to others, I think, to have a warning posted in the announcement that you have to been registered for the event in order to watch the reply on Hopin.