AI Note Taker for YouTube Videos — Learn 10X Faster
LunaNotes uses AI to turn your YouTube videos into clear, structured notes in seconds. Instead of pausing, rewinding and writing everything by hand, you get an instant summary you can quickly review and refine.
Photosynthesis · Lecture 4
Create from this video
- 00:00
Why plants need light
Photosynthesis turns light energy into chemical energy stored in glucose.
- 04:12
Light-dependent reactions
In the thylakoids, water is split, oxygen is released and ATP and NADPH are made.
- 17:40
The Calvin cycle
In the stroma, RuBisCO fixes CO₂ into three-carbon sugars using ATP and NADPH.
- 27:05
C4 and CAM plants
Two workarounds for photorespiration in hot, dry climates.
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AI-powered benefits for YouTube learners
Photosynthesis · Lecture 4
Intro to Biology · 38:12 video · 3 min read
Plants turn light into chemical energy in two stages. The first captures energy from light; the second spends it to build sugar from CO₂.
Light-dependent reactions 04:12
- Happen in the thylakoid membranes
- Water is split and oxygen is released as a by-product
- Energy is stored as ATP and NADPH
The Calvin cycle 17:40
- Runs in the stroma and needs no light directly
- RuBisCO fixes CO₂ into three-carbon sugars
Save 90% of your YouTube note-taking time
Turn a 30-minute YouTube video into a focused 3-minute read. AI watches the video for you, extracts what matters, and delivers clean, structured notes.
- 00:00
Why plants need light
Photosynthesis turns light energy into chemical energy stored in glucose.
- 04:12
Light-dependent reactions
In the thylakoids, water is split, oxygen is released and ATP and NADPH are made.
- 17:40
The Calvin cycle
In the stroma, RuBisCO fixes CO₂ into three-carbon sugars using ATP and NADPH.
- 27:05
C4 and CAM plants
Two workarounds for photorespiration in hot, dry climates.
AI finds the key concepts for you
No more pausing, rewinding or manually highlighting. AI automatically identifies definitions, formulas, arguments and examples so you never miss an important idea.
Why does the Calvin cycle need the light reactions if it doesn't use light?
Because it runs on what the light reactions make. Each turn spends ATP and NADPH to turn fixed CO₂ into sugar [1].
That ATP comes from the same proton gradient you noted for cellular respiration: ATP synthase works the same way in both [2]. When light stops, the supply runs out within seconds and the cycle stalls with it [3].
Used 3 sources
Understands context across your knowledge base
LunaNotes AI connects new videos with your existing notes and topics. The more you learn, the smarter your AI note taker for YouTube videos becomes.
AI Features That Automate Your YouTube Learning
AI Diagrams
Generate visual concept maps from your notes or videos with one click.
AI Flashcards
Generate study-ready flashcards from your notes or videos with one click.
AI Notes
AI Notes instantly transform videos and text into clear, structured notes. Perfect for fast, organized learning.
What our users say
Trusted by thousands of learners worldwide
I am amazed by experiencing it. It is so helpfull for my office work as well as personal work.
It simple, easy to use and effective.
Permite tomar notas mientras se ve un vídeo en YouTube y las vincula al momento exacto del vídeo. También permite hacer una captura de pantalla con anotaciones durante el vídeo. ¡MUY RECOMENDADA! 
Love it, simple to use and easy. It auto pauses the video when I start typing, which is cool.
I love this :) Please don't add too much complicated stuff that clutters the note section, I want it to be simple as is.
Excelente! 
Simple awesome. Nothing can be simpler then this and works beautifully. I appreciate the idea and the team who coded this. Amazing
The best extension in webstore. So many functions available here You can customize your notes with powerful and easy-to-use editor.
Perfecta para agregar muchas notas en cada vídeo y saber en que tiempo del vídeo se creo la nota 
Great great extension for learning and taking notes on u2bee!
Very useful tool. I'm using it for the last couple weeks and I'm loving it so far. Makes learning on YouTube a great experience.
Super eficiente me encantó <3 
Muy buena para tomar notas a la par de tutoriales de código. 
This extension works pretty well 10/10
Me sirve mucho cuando estoy estudiando con videos de youtube, para destacar momentos importantes de los videos que miro. Es una app muy útil y recomendable. How LunaNotes AI Works for YouTube
What the AI does automatically
LunaNotes is an AI note taker for YouTube videos that turns any video into clear, structured notes. It extracts and cleans the transcript, detects key ideas and segments the content so you can skim instead of rewatching.
AI-powered features in one place
From one YouTube link, the AI can generate concise summaries, key bullet points and review-friendly notes you can edit and organize. It works as a youtube note taking AI that helps you learn faster without changing your current workflow.
Models, credits and privacy
You pick the model behind your AI notes from YouTube: 22 models from labs including OpenAI, Anthropic and Google, with DeepSeek Flash as the default. You start with 1,000 free AI credits each month, and your notes stay visible only to you and the people you share them with.
Pick your plan
The AI tools run on credits. Higher plans add more credits, more storage, and power features.
Free
For trying it on a few videos and documents
1,000 AI credits a month
Free forever
Free forever · no credit card
Starter
For studying or working with it every week
30× the AI use of Free
Billed monthly · cancel anytime
- Everything in Free, plus:
Cancel anytime · refunds per our Terms
Plus
For heavy daily use, with the best models
4× Starter
Billed monthly · cancel anytime
- Everything in Starter, plus:
Cancel anytime · refunds per our Terms
Frequently asked questions
You choose. LunaNotes offers 22 AI models, including Claude, GPT and Gemini models, with DeepSeek Flash as the default. The Free plan includes a smaller set; Starter and Plus unlock the rest. The same models power our AI note taker for YouTube videos, from summaries to flashcards and diagrams.
No. Your data from LunaNotes is not used to train public AI models. Video transcripts, notes and questions are processed only to generate your results and are handled according to our privacy policy. We focus on keeping your AI notes from YouTube video secure, so you stay in control of what you store and share.
Accuracy depends on the audio quality and clarity of the YouTube video, and on the model you pick for the run. You can always review and edit what the AI produces, combining AI speed with your own judgment. Many learners report that they capture more key ideas with our youtube note taking AI than with manual notes alone.
Every AI-generated note is fully editable. You can rewrite, correct or expand any part of the summary. AI handles most of the work, and you keep final control over accuracy and clarity.
Yes. All AI-generated summaries and flashcards are completely editable. Once created, they become normal content in your workspace, so you can modify anything freely.
Each AI action is charged for what the model actually used, so longer sources cost more. On the default model a typical video summary is about 25–50 credits, a flashcard deck 15–20 and a diagram 20–40. The Free plan includes 1,000 credits each month, and paid plans include more.
Explore what else LunaNotes does
Each one works on the same notes, so what you make in one feeds the rest.
Make it studyable
Bring it in
- Video workspace Your video library, with notes attached
- Timestamped notes Notes that jump back to the moment
- YouTube extension Notes and transcripts inside YouTube
- YouTube courses Work through a playlist in order
- Bookmarks Save any page, find it again
- Meeting notes An AI notetaker for Google Meet
- Podcasts Subscribe, listen, keep the notes
- Files PDFs, documents and images you upload