Greg,
G'day.
Gresham College, London puts on public lectures on many topics for people to attend, watch on the www. or download. Home page is at
https://www.gresham.ac.uk
There is link to All Past Lectures. Select the category you want. Lots of astronomy topics amongst the science lectures. The previous Gresham Professor of Astronomy, Caroline CRAWFORD really appealed to me - easy to listen to and topics presented for the public to understand. My favourite was her 2012 lecture on Atmospheric Phenomena.
Cheers.