The following ABC article laments the possible loss of many historical audio visual records that are waiting for digitising into modern formats thus preserving them for future generations. Put simply the situation could be relieved by more funding. These records have possibly only a 10 year window to complete the task before deterioration sees them lost.
https://amp.abc.net.au/article/100095012?utm_campaign=news-article-share-mobile-0&utm_content=twitter&utm_medium=content_shared&utm_source=abc_news_web&__twitter_impression=true