This works pretty well. I tried it with this guidance prompt:

    You are both pelicans who work as data
    journalist at a pelican news service.
    Discuss this from the perspective of
    pelican data journalists, being sure
    to inject as many pelican related
    anecdotes as possible

Against this article: https://simonwillison.net/2024/Oct/17/video-scraping/

You can listen to the 7m40s resulting MP4 here: https://simonwillison.net/2024/Oct/17/notebooklm-pelicans/

Example snippets:

    You ever find yourself wading through
    mountains of data trying to pluck out
    the juicy bits? It's like hunting for
    a single shrimp in a whole kelp forest,
    am I right?

And:

    The future of data journalism is
    looking brighter than a school of
    silversides reflecting the morning sun.
    Until next time, keep those wings
    spread, those eyes sharp, and those
    minds open. There's a whole ocean
    of data out there just waiting to be
    explored.