Four ways to turn YouTube into knowledge
Same goal, different residue. What you should pick depends on whether you read a summary once, or want to pull it back up months later. The table below compares approaches, not specific products.
The four approaches
YouTube summarizers
The quickest way to get the gist of one video right now.
Taking your own notes
Deepest understanding, and you decide exactly what is worth keeping.
General AI chatbots
You can keep asking follow-up questions.
Stacktube
Watches channels for you and writes structured notes into the place you already keep knowledge.
| YouTube summarizers | Taking your own notes | General AI chatbots | Stacktube | |
|---|---|---|---|---|
| How you start | Paste a video URL. | Watch and write as you go. | Paste a video URL or transcript. | Register a channel once, or paste a video URL. |
| When a new video goes up | You paste it again. | You watch and write again. | You paste it again. | Registered channels are checked and analyzed automatically. (Starter: 1 channel weekly · Pro: 7 channels daily · Max: 15 channels daily) |
| Where the result lives | Inside that tool. | In whatever notes app you use. | In the chat session. | Delivered to your Obsidian vault, email, Google Drive, Dropbox, or Kindle. (Starter: web and email) |
| Note structure | Whatever format the tool produces. | Whatever format you choose. | Varies each time, depending on how you ask. | Each video is classified into one of eight types (framework, tutorial, analysis, review, book, talk, explanation, news) and structured to fit. |
| File format | Depends on the tool. | Whatever you write in. | Chat text. | Markdown with [[wiki-links]] and YAML frontmatter, so it joins your existing graph as-is. |
| Searching across videos | Works per video. | Your notes app's own search. | Works per conversation. | Cross-Video search answers across everything you have collected. (Pro plan and above) |
| Asking follow-up questions | Some tools support it. | Not applicable. | This is what it is best at. | Not supported. It focuses on producing and delivering the note. |
| Cost | Depends on the tool. | Costs you time. | Depends on the tool. | Starter free (10/mo) · Pro $7.99/mo (50) · Max $19.99/mo (150). If no note gets made, the analysis is not deducted. |
What Stacktube does not do
Better for both of us if you know the misfits up front. If any of these matter to you, another approach fits better.
- You cannot hold a back-and-forth conversation with a note. If interactive follow-up is the point, an AI chatbot is the better fit.
- Notes come out in English, 日本語, or 한국어 — three languages. (The video itself can be in any language, as long as it has captions.)
- A video with no captions at all falls back to a lightweight analysis from the title and description.
- Obsidian sync and Cross-Video search start at the Pro plan. Starter delivers notes via web and email.
- reMarkable works by delivering to Google Drive or Dropbox and letting reMarkable's own sync pick it up. We do not push to the device directly.
This table compares approaches (categories), not specific products. Figures about Stacktube are current as of 24 August 2026.