Can I use NotebookLM for YouTube videos?

Yes. NotebookLM natively supports YouTube videos as a source type. Open your notebook, click "Add Source," and paste the public YouTube URL. NotebookLM fetches the video's auto-generated or manually added transcript and treats it as a text source you can query, summarize, and cite.

The video must be public and have captions enabled — NotebookLM works from text, not audio or video files, so caption-free videos will fail to import. Once a video is in your notebook, you can ask questions like "What did the speaker say about X?" or "Summarize this video in three bullet points." It is one of the most useful source types for lecture content, conference talks, and long-form interviews.