This is absolutely incredible - I sincerely hope for the sake of posterity and for all those with a keen interest in Australian political history that the full proceedings of the Joint Sitting are uploaded for all to view!
I saw highlights on the House of Representatives RU-vid channel earlier in the week. As a nerd of all things parliamentary, I hope to watch the full debates in the future! Thank you to the NAA for bringing this to life.
The original umatic will stay in the archive - digitising just ensures that the content is preserved even if the technology to play the tapes isn't being made or maintained anymore.