There's a video at this location ( https://archive.org/details/ANA90022WalterBreenAnswersYourQuestions ) where the late Walter Breen answers questions from the audience, probably at an ANA convention in 1990. I enjoyed it, although it is quite dated.
Yeah, the fidgetiness is a noticeable feature, for sure. The date on this is August 1990, so maybe it's from that year. He'd be dead in less than three years from cancer.