this video showing how diffusion models generate text is mesmerizing to look at! (comment in top thread linked in your search results)
https://www.reddit.com/media?url=https://i.redd.it/xci0dlo7h...
https://www.reddit.com/media?url=https://i.redd.it/xci0dlo7h...
EDIT: This video in TFA was actually a much cooler demonstration - https://framerusercontent.com/assets/YURlGaqdh4MqvUPfSmGIcao...