Advanced analysis of YouTube transcripts and text
You spend hours on lectures and podcasts, but a week later you remember almost nothing. Sapyora turns the material into a clear, structured explanation that you can also explore critically. You retain what matters and find it again anytime in your library.
For YouTube sources, Sapyora generates the material from the available transcript — it does not analyze images, video frames, or the audio track.
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Add a video link or written content — from a long article to an entire book or magazine. Sapyora reconstructs the ideas, examines them critically and makes them easy to explore.
Use any YouTube lecture, podcast or interview. For written content, paste text or attach one or more files: entire books, long articles or complete magazines, up to a total of about 2,000 text pages in a single processing run.
It reads the full material, explains its case faithfully and builds the strongest case for the opposing view. With no forced quotas, it extracts principles, claims and theses, mechanisms, mental models, practices and abstractions.
Switch between the source and critical reading, choose the right form and search everything you save. Keep it private or publish it to the shared library.
The same reading forms organize both the source's case and the strongest case built for the opposing view.
What the source argues, reconstructed faithfully and clearly without weakening its case.
The strongest case for the opposing view, with evidence, limits and conditions — not a verdict that the source is wrong.
The essentials in a quick read: conclusion, ideas, principles, models, abstractions and limits.
The complete article, clarified with definitions, mechanisms, examples, key ideas and pitfalls.
The claims worth remembering, each connected to its explanation and context.
A real example generated from a complete material. Move between Material and Counterpoint and explore every category: claims, mechanisms, actions, principles, models and abstractions.
Physiology · Endocrinology
The six extracted knowledge types are principles, mental models, abstractions, claims, mechanisms and actions. We explain them here so you can recognize them everywhere.
A law or causal regularity of reality — an “if X, then Y” relationship that stays true whether anyone is thinking about it or not. Principles explain WHY things happen.
Example: “Compound interest”: any constant percentage growth, reinvested, produces exponential effects — with money, skills, or an audience.
A thinking tool you deliberately pick up to judge a situation: a lens, a heuristic, a frame. Mental models don't describe the world but the way you look at it — they answer HOW to think about a problem.
Example: “Inversion”: instead of asking “how do I succeed?”, ask “what would guarantee my failure?” — then eliminate exactly those behaviors.
A compressed concept: a short term that packs a complex idea into a memorable form. Once learned, an abstraction becomes a vocabulary piece you think and communicate faster with.
Example: “Opportunity cost”: the value of the best alternative you give up when you choose something — an entire economic argument in two words.
Separates important propositions from central theses supported by argument, preserving the explanation and sources behind each nuance.
Example: “Insufficient sleep reduces attention the next day” — a clear proposition that evidence can support or challenge.
Shows the causal chain or process through which an effect occurs — not merely that two things appear together.
Example: “The feedback loop”: an action produces a result, the result provides information, and that information adjusts the next repetition of the same action.
Turns applicable ideas into repeatable actions, flexible procedures, or explicit steps you can reuse.
Example: “Weekly review”: once a week, gather your commitments, choose priorities, and define the next steps.
Everything turns watching into a library you can actually use.
Switch between the source and its critical reading while cognitive units are consolidated by identity, with sources, nuances and favorites in one knowledge base.
Key terms are highlighted with hover tooltips, so you never lose the thread on jargon.
Instantly search everything you save — readings, principles, theses, mechanisms, models, practices and abstractions from your materials.
Read the material and its critical reading in your language, regardless of the source language.
Members can make their own processed materials public, so everyone with an account can find them — a growing common library, in your language.
If material generated from a YouTube source transcript already exists in your language, it is added instantly with no credits used.
Classic, Nocturn and Dark — comfortable reading day or night.
Send any material, with all its reading forms and perspectives, through one private link — even to people without an account.
Add a whole playlist or a multi-hour source — Sapyora works with each item's available transcript and handles the length.
Got a playlist or many transcripts to analyze? Turbo starts several materials at once instead of one at a time. It does not speed up an individual material and is optional.
Not just video: paste text or attach .txt/.pdf files — even several at once — and each becomes clear, structured material that is also examined critically.
A toggle highlights exactly what the AI added on top of the original material — you always know what you're reading and where it came from.
Choose one language for the interface, material and critical reading. The source can be in a completely different language; we handle the translation.
To trust what it does, it's only fair you know what it doesn't.
An article gives you the structure, principles and key ideas of a material. When a video truly grips you, it deserves to be watched in full — the article helps you decide if it's worth it, and retain what matters.
Materials are AI-generated and can contain errors. That's why every article carries a visible marker and a link to the original source — verifying important information stays with you.
Condensing means selecting: we keep what you can use — how a subject works, why it's true, what's worth remembering — and let go of the rest. For any detail, the source is one click away.
We don't sell your attention and we don't sell your data. Our only income is the membership — which is why the only person we serve is you, the reader.
A single annual membership — and every euro comes back to you as processing credits.
For YouTube sources, Sapyora generates the material from the available transcript — it does not analyze images, video frames, or the audio track.
🎁 New accounts get 100 credits as a gift — your first material is on us.
What you process stays yours — forever.
You see the exact estimate before every run.
| No account | Free account | Member — €12/yr | |
|---|---|---|---|
| Read the public examples, complete, in 15 languages | |||
| Open and read materials received via a link | |||
| Analyze YouTube transcripts, playlists, and written materials | 🎁 100 gift credits | 1,300 cr first year · 1,200 on renewal | |
| Permanent personal library: re-reading, search, PDF export | |||
| Your consolidated knowledge base is built from your own materials | |||
| Ask your library and receive answers with citations | |||
| Favourites, learning state and private notes | |||
| Received links stay in “Received” without automatically changing your knowledge base | |||
| Email reminders from your library (optional) | |||
| The shared member library — browse and publish | |||
| Materials already processed by others — instant, 0 credits | |||
| Credit top-ups whenever you need more |
The free account needs no card and never expires. What you process with the gift credits stays yours forever.
Not a fit? You get all your money back, no questions asked, through our payment processor.
1 credit = €0.01. You see the exact estimate before confirming any run, and failed runs are refunded automatically, in full.
Whatever you don't use stays in your account. And if a material was already processed in your language, you get it instantly, at no credit cost.
Payments via Lemon Squeezy (Merchant of Record), data handled under GDPR, and account export and deletion are one click away, in settings.
Long, idea-dense content: YouTube lectures, podcasts, talks and interviews, but also whole books, long articles, essays, magazines and PDFs. You can combine files up to roughly 2,000 text pages in one run.
A faithful Source reading and a critical Counterpoint, each available as a summary, full article and key ideas. Sapyora also extracts and consolidates six cognitive types: principles, mental models, abstractions, claims, mechanisms and actions.
It is the strongest well-supported case for the opposing perspective, built for comparison rather than as a verdict that the source is wrong. It surfaces objections, limits and conditions that make the original idea more precise.
Yes. Ask your library synthesises an answer from your processed materials and consolidated knowledge, and shows the exact sources used. If the library lacks enough evidence, it says so instead of filling the gap. Each completed answer costs 1 credit, refunded automatically if a technical error occurs.
Similar principles, models, abstractions, claims, mechanisms and actions are consolidated under one identity. Each source adds an explanation, nuance or counterpoint, so you keep the differences without multiplying the same idea.
It depends on length and language. As a rounded guide: 30 minutes ≈ 100 credits, one hour ≈ 120 and 90 minutes ≈ 140. Before starting you see the estimate calculated for that material; the final charge follows the real processing cost and any unused reservation is returned.
Members can publish their materials and browse what others have published. If material from the same YouTube source transcript already exists in your language, it is added instantly at no credit cost. Curated examples remain open to everyone.
Without an account you can read it in full in the Example Library, but you do not get a personal library. With an account, the link is kept in “Received”, but its knowledge does not enter your knowledge base automatically. For a public YouTube source, members can generate material from the available transcript or receive their own copy instantly if it already exists. Text, PDFs, and paid or restricted YouTube sources can be read through a private link but cannot be reused automatically in the recipient’s knowledge base.
Yes, by default. You decide whether to keep a material private, share it through a private link or publish it in the member library. You can withdraw access or unpublish it later.
Your account details stay private and are never sent to the AI. Transcripts and submitted texts are processed through paid business APIs that do not use them to train models. You can export or delete your account from settings.
Processing starts from the full transcript or text. AI highlighting distinguishes additions from the source, citations link answers back to evidence, and you can return to the original or edit your material if an interpretation needs correction.
Fifteen: English, Romanian, French, German, Spanish, Italian, Portuguese, Dutch, Polish, Turkish, Hungarian, Swedish, Norwegian, Danish and Finnish. The source can be in a different language from the one you choose for reading.
Yes. A free account comes with 100 gift credits, needs no card and does not expire. Public examples are complete and open even without an account; whatever you process with the gift stays in your library.
Sapyora is built and maintained by one person together with AI agents — without investors, offices, a sales department or an advertising business. The €12 returns to you in full as processing credits, so the membership supports an independent learning tool while you pay for the machine's real, metered work.
