Google made available its NotebookML service (notebookml.google.com). It let's you upload a bunch of documents and then cooperate with GenAI on that context.
The most "ground-breaking" feature is the ability to generate Deep Dive podcast about your documents.
I've tried that on my coding tips and while the result is profoundly cool in the audio quality, the contents are a mixed bag. I could forgive the fluff content and some technical nonsense, the AI can hallucinate after all.
But what is really funny is like the male voice often proposes a topic A, then the female voice responds with something along the line "that's cool, explain it to me" to which the male voice slightly pivots to topic A.b, and then the female voice starts explaining topic A by herself.
Just listen for yourselves.