In September 2024, Google added public YouTube URL and audio file support to NotebookLM, allowing users to pull in a transcript from a public YouTube link to get summaries, explanations, and study guides. Users can ask about main themes, line up multiple videos against each other, and turn lectures, certification courses, coding tutorials, language lessons, or research material into notes. The Chrome extension YouTube to NotebookLM enables importing videos, playlists, channels, and search results with one click. The feature aligns with a broader 2024-2025 move toward automated digital tools in education. However, the article notes that summaries can stay on the surface, transcript quality is not always consistent, logic-heavy subjects do not always compress cleanly, and any generated answer needs to be checked against the source. The feature is available in Google NotebookLM through YouTube links, with faster importing available through the YouTube to NotebookLM Chrome extension.