NotebookLM just added a new output format that feels tailor-made for the way people actually consume content today: Short Video Overviews. Upload any source material, and the tool will generate a 60-second, portrait-orientation video that distills the key ideas into something you could watch during a commute or a scroll break. It is rolling out now to Google AI Ultra and Pro subscribers on mobile and web, with free users coming soon.
The anatomy of a Short Video Overview
NotebookLM is using Nano Banana 2 Lite for Short Video Overviews, producing a 60-second portrait video with "narrative explanations and educational animations." Think of it as the TikTok-length sibling of the longer Cinematic Video Overview format that launched earlier this year.
Nano Banana 2 Lite, officially known as Gemini 3.1 Flash-Lite Image, is Google's "fastest and most cost-efficient image generation and editing model," with the company touting 4-second image generation. Compared to the original Nano Banana (Gemini 2.5 Flash Image), this new model offers "fast image generation with a significant leap in visual quality and capability."
The Short format sits alongside the existing Video Overview lineup. Here is how all three formats compare:
| Format | Length | Orientation | Best for |
|---|---|---|---|
| Brief | ~1-2 min | Landscape | Quick concept grabs |
| Explainer | ~2-5 min | Landscape | Structured deep dives |
| Cinematic | ~1-3 min | Landscape | Animated, story-driven summaries |
| Short (new) | 60 sec | Portrait (vertical) | Mobile-first, shareable explainers |
How the pipeline actually works
NotebookLM's video generation is not powered by a single model. It combines three distinct AI systems, each handling a different part of the production pipeline. Gemini handles the comprehension layer: when you add sources to a notebook, Gemini reads and analyzes them to build a shared understanding of the content.
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