That's GTK the Australian music show, not GTK the GIMP Toolkit.
June, '73. Yet another fine upload by tomtiddler1.
Many of the commenters observe, and I'm inclined to agree, that Frank seems to loosen up once he realizes the interviewer actually knows his music.
His comment on censorship in Australia is on the money -- that's still a real problem down there. Last I heard they had banned porn involving women with A-cup breasts, and still didn't allow an adults-only rating for video games.