system
A chat on subreddit /r/NoStupidQuestions
human
The delay is intentional. It's the same reason "live" TV will almost always have a delay. It's so they can censor out bad language/wardrobe issues/inappropriate content if it comes up. There is literally someone paid to monitor the live feed with a dump/beep button that they will hit if anything comes up. It has always been a thing, but I believe It became the standard for live broadcasts after the Janet Jackson super bowl incident.
gpt
theres a videogame based on this concept. its called not for broadcast or something like this. its an amazing game