Google has this week (September 26) shared new additions to its AI note-taking and research assistant NotebookLM, including shareable AI-generated audio discussions and YouTube summaries. While NotebookLM was initially launched as a project at the I/O developer conference in 2023, the search giant is now expanding its use cases and reach. In a news release published on Thursday, the author shares the details: “You can now add public YouTube URLs and audio files to your notebook for an even deeper understanding of your sources.” They write that early testing has outlined three ways the new source type in YouTube and audio files can be used.