I know people vary in their acceptance of AI, and I have my own concerns, but I've been using NotebookLM lately and really enjoying it. You include sources into a notebook and it adds the content into a model.
I add episode recordings into a notebook and it provides stunningly good summaries, and also answers questions about the content very well. It isn't perfect, and occasionally you have to correct it (especially names), but it has proven to be very useful for helping me to remember things that happened 100+ episodes ago.