He is talking specifically about sellers who have gone through an extensive KYC process. Those sellers identified as verified have connected a few account with Keybase, provided their real phone number, and provided their local government photo ID. We also do a check with the seller via webcam.
It is a very nice process to identify and fight scamming on transactions and business that deals with decentralized and anonymous. Telegram has turned to the home of scam. I do receive ton of messages in my telegram account daily and sometimes after much verification, I do discover that those projects are completely scammed. Scamming will reduce if we began to ask people to do KYC before doing business with them.
I am for privacy and that is what bitcoin was created for. Making transactions without KYC or third party knowledge! However, because of the scamming, that is going on that has changed.