NotebookLM and YouTube: Research Videos and Transcripts

Gemini Notebook, the current name for NotebookLM since July 2026, accepts YouTube video URLs as sources. Paste the link into the source panel and the notebook fetches the transcript and metadata, making the video's spoken content available for questions and citations. Tools like fenbs can keep the verified video links and the tasks that came out of your research in one place, across sessions.

For a broader look at how Claude handles video content, see /blog/claude-for-youtube-videos. This article covers the specific workflow for Gemini Notebook.

What Gemini Notebook does with a YouTube video

When you add a YouTube URL as a source, Gemini Notebook retrieves the video's auto-generated or community captions and treats them as a text source. It does not watch the video or analyze visual content; it works from the transcript. This means the quality of the source depends entirely on the quality of the captions.

Once the source is loaded, you can ask questions about the video's content and the notebook will cite the relevant part of the transcript. You can also ask it to summarize the video, generate an outline, or compare the video's claims against other sources in the notebook.

How to add a YouTube video as a source

Open the notebook's source panel and select the option to add a URL. Paste the YouTube video's share link—the standard youtube.com/watch?v= format or the youtu.be short link both work. The notebook will attempt to load the transcript. If the video has no captions, or captions are disabled by the creator, the source may not load or may load with limited content.

Check that the source loaded fully before relying on it. Open the source and look at the text that was imported. If it is truncated or missing key sections, the notebook's answers about those parts will be unreliable. Videos with auto-generated captions from fast speech, technical jargon or strong accents are particularly likely to have accuracy issues.

• Standard YouTube links (youtube.com/watch?v=...) and short links (youtu.be/...) both work.
• Videos without captions or with captions disabled may not load as a useful source.
• Auto-generated captions for technical content, non-standard accents or mixed languages are more likely to contain errors.
• The notebook works from text only; it does not analyze charts, diagrams or visual demonstrations in the video.

Working with the transcript

You can ask Gemini Notebook to show the transcript section that supports a given answer. This is the most important habit to develop: any claim the notebook makes about a video should be traceable to a specific part of the transcript. Ask it to quote the passage, then check the quote against the original video if the claim matters.

If you need the raw transcript text, ask the notebook to show a specific section. You can also use a browser-based transcript viewer to read the captions before adding the video, which lets you assess the quality before committing the source to the notebook.

YouTube playlists: what works and what does not

Gemini Notebook does not accept YouTube playlist URLs. Paste a playlist link and it will likely fail or load only the first video. To use multiple videos from a playlist, open the playlist in YouTube, click each video you need and copy its individual URL, then add each one separately to the notebook's source panel.

If you have many videos to add, consider whether they are all necessary. Each source adds to the amount of text the notebook must reason over. A focused set of directly relevant videos often produces better answers than a large set that includes loosely related content.

What to check when a video source does not load

If adding a YouTube URL fails or produces an empty source, work through these possibilities in order. First, confirm the video is publicly available and not age-gated, region-locked or private. Second, check whether captions exist at all—open the video in YouTube and look for the caption toggle. Third, try a short, well-captioned public video to confirm the feature is working before assuming the specific video is the problem.

If captions are absent, you can add the video's transcript as a text source yourself: open the transcript in YouTube, copy the text, and paste it into the notebook as a direct text source. This requires an extra step but gets the same content into the notebook.

How to do this with fenbs

fenbs does not connect to YouTube or Gemini Notebook. It keeps the project record—verified sources, tasks, decisions and context—that persists when you switch AI apps or resume research in a new session.

1. Create a free account and open or create the research project.
2. After verifying each YouTube source loaded correctly in Gemini Notebook, add the URL to the project's Links and listings with a status note.
3. When a video confirms a key fact or contradicts another source, note it as a task or context note so the next session starts with that finding.
4. If you move to a different AI tool, connect it from Integrations; it will read the verified source list and project notes before continuing.
5. Save progress before each session ends so the next session knows which sources were checked and what questions are still open.