For context, the interviewer was bringing up the issue that insane people don't make sense. You can't talk with them. They played a couple clips of some people saying nonsense. So how do you deal with that?
So Szasz says, at 19:15, that he had this same discussion 20 years ago. A reporter from The Newyorker called Szasz and brought it up. So Szasz made a trip to New York and met him for an experiment. They went to central park and found a homeless schizophrenic guy and tried talking with him.
The conversation was perfectly normal. There were some wine cartons nearby, and they talked about wine. The guy knew how to get his welfare check, he'd been in Bellview several times, he gave a long description of how to stay out of the mental hospital (the last thing he wants to be in). He said where he can get a shower sometimes and how he gets food.
But the reporter didn't publish the story. His axe to grind was to show how crazy these people are and how they need mental healthcare. So when the experiment didn't fit his agenda, he didn't publish.