The year-long delay in appearance was caused by my heavy use of slides, which the in-house video editors at the State Library struggled with a little. After much discussion back-and-forward I asked them to post it online as it is, though there are still a few mis-matches, rather than delay posting it any longer.
Although it is always a little weird to see yourself on video, it is nice that it the lecture is finally available. In the second half of this year I will write up the presentation formal as a formal essay, which will be published by the Ancora Press at Monash University in association with the State Library. Until then, comments, corrections, hints etc. are all welcome!