On October 14, 2025, Google announced a major upgrade to the video overview feature of NotebookLM, leveraging the latest Gemini image generation technology, "Nano Banana," to enable automatic video creation based on document content. Users can choose from six visual styles, including watercolor and anime. The new "Brief" format complements the existing "Explainer" format, meeting the needs for quickly extracting key points from documents and providing in-depth explanations. This feature will be initially available to NotebookLM Pro users this week and will be gradually rolled out to all users in the coming weeks.