AI Notebook for Video, PDF & Web Pages
Add one or more sources, a video, a PDF, or a link to an article, and get a structured breakdown, plus a full transcript for video. Then ask about all of it in one chat.
Cruxly's notebook takes three kinds of sources: a YouTube video link, a PDF file, and a link to any web page. Each source gets its own breakdown: a one-sentence takeaway, a full summary, key points, and practical advice, plus a full verbatim transcript for video. Sources can be combined: add a lecture video and a PDF of the notes on the same topic to one notebook, and the chat answers from both at once instead of one at a time. The chat opens right after analysis and keeps the entire notebook's content in memory: you can ask about a specific moment, request an outline, a comparison, or an example. Individual thoughts from any breakdown can be saved to your second brain, where Cruxly finds the connections between them on its own.
How AI Breaks Down a YouTube Video
Captions or speech recognition, translation, key ideas: the details are in the complete guide.
Read the guide to AI YouTube video analysisHow Verbatim Transcription Works
How a transcript differs from a summary, and when you need one instead of the other: the details are in the complete guide.
Read the guide to AI video transcriptionHow AI Analyzes a PDF
Text extraction, document structure, scanned files: the details are in the complete guide.
Read the guide to AI PDF analysisHow Document Chat Works
How the chat finds the right passage and why it answers from your file instead of the model's memory: the details are in the complete guide.
Read the guide to PDF chatHow AI Breaks Down a Web Page
How the service pulls a page's main text out, and what happens with pages that aren't a single article: the details are in the complete guide.
Read the guide to AI website page analysisHow the Notebook Differs From NotebookLM
No-VPN access, a second brain that connects across notebooks, and an honest look at where NotebookLM is stronger: the details are in the complete guide.
Read the guide to Cruxly's AI notebookHow the Cruxly Notebook Works
- 1Add a video, PDF, or page link to a notebook
- 2The AI breaks it down right away: summary, key points, plus a transcript for video
- 3Add more sources on the same topic to the same notebook if you like
- 4Ask a question in the chat: it answers from every source in the notebook at once
What Kind of Sources Work
- YouTube videos: lectures, podcasts, webinars, reviews
- PDF documents: textbooks, reports, articles, contracts
- Web pages: articles, blog posts, documentation
- Several sources on one topic, tied together by one chat
Example Use Cases
Student
Adds a YouTube lecture and a PDF of the notes on the same topic to one notebook, and asks about both at once before an exam.
Lawyer
Uploads a contract and quickly finds the right clause in the chat instead of scanning the document by hand.
Analyst
Breaks down a competitor's quarterly report as a PDF and their earnings interview on YouTube in one notebook, comparing the numbers and the words in one chat.
Researcher
Collects several articles and web pages on a topic in one notebook to compare how different authors approach it.
Marketer
Breaks down a competitor's landing page by link and their pitch deck as a PDF, pulling out the positioning from both.
Content creator
Gets a transcript and a summary of a video in one place for subtitles and a text version of the same content.
Frequently Asked Questions
Add your first source to a notebook
A video, PDF, or page link — free account required, takes 30 seconds.