There is a link below to a book where Thomas Szasz expands on some of the themes discussed in these videos:

The Myth of Mental Illness: Foundations of a Theory of Personal Conduct
https://amzn.to/3RCi16X
It was published around the same time that these films were recorded.

A conversation with Thomas Szasz. Filmed at the Centre of Excellence in Interdisciplinary Mental Health where he discusses 'does mental illness exist?'