This could probably go into the TCG/OCG News, Information, and Tournaments subsection.
Anyways, yeah I saw the vid a few days ago. There were content creators there, but it's difficult to know the criteria for them being invited or anything. As you said, he didn't give any sources, so as far as I could tell, it was speculation. Passionate speculation, but speculation nonetheless. The amount of creators at the event was limited and it did feel as though Konami was testing the waters by inviting them. That said, if this happened multiple times it'd be easier to see Cimo's points.
Where did he say something about a public discussion? I don't remember that in the vid, but maybe I just forgot.
He said there was a discussion but never explicitly said it was public but it sounded like it was. I could be wrong