I remember watching this program on Doordarshan as a kid. What a nice surprise to come across it again on youtube! I specially remembered the scene where Nutan talks about the famous scene from Bandini. This was my first lesson in auteurism!
Doordarshan has uploaded other episodes as well, featuring Raj Kapoor, Shyam Benegal, Ritwik Ghatak, Mrinal Sen and Manmohan Desai (!).