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YouTube, unlocked.

There's a library's worth of knowledge locked inside YouTube.

KnowStash turns the videos you care about into clean, searchable notes, written by AI while you get on with your day. Capture on YouTube, keep it at knowstash.ai, and let monitors watch the channels you can't.

Get started free → Add to Chrome

3 free credits · No card · No subscription · Works in any browser, phone included, with a YouTube companion for Chrome, Brave, Edge & Arc

How it works

From video to note in three moves.

1.

Save it

Paste a link at knowstash.ai, or send it from the companion panel beside any YouTube video. KnowStash reads the video once and keeps it. Save it once; using it never costs again.

2.

Ask for the note you want

In your own words, or with a saved prompt. A recipe card, a study guide, a wiki of your favourite artist. Not sure what to ask? Suggest writes a first prompt you can edit. Estimates can show the price and roughly how long it will take before you press send, and then the note streams out.

In your own words, or with a saved prompt. An analyst's calls with every number she gave, the complaints in ten product reviews, what a results call said about guidance. Not sure what to ask? Suggest writes a first prompt you can edit. Estimates can show the price and roughly how long it will take before you press send, and then the note streams out.

3.

Keep it, and build on it

Notes land in your library at knowstash.ai, where you can search them, sort them into collections, share them with a link, and add to them as new videos come in.

Notes land in one library at knowstash.ai that the whole team can search, with a collection per client or project. Share a note with a link, and add to it as new videos come in.

What you get

Everything between watching and knowing.

Notes in your words, not a generic summary

Ask for exactly the note you want: the recipe without the life story, a wiki of your favourite band, the week's market calls, what the Q&A actually answered. Ask what was said about anything, and each point links to the moment it was said. You pick the model for each note, standard or premium, and estimates put the price and the likely wait beside the send button, before anything runs.

Ask for exactly the note you want: an analyst's calls with every number she gave, what a results call said about guidance, the questions the chief executive dodged. Ask what was said about anything, and each point links to the moment it was said. You pick the model for each note, standard or premium, and estimates put the price and the likely wait beside the send button, before anything runs.

  • Streams live, in clean formatted markdown
  • Reads the spoken words, or the video frames too: slides, charts, demos
  • Scope it to a chapter, or span several videos
  • Estimates: the cost and the time, before you press send
  • Saved prompts for the asks you repeat
  • Leave the page while it writes; a small card keeps track

Watch: Your first note1:33Watch: An interview, as a note1:40

A note open at knowstash.ai: “Beginner's Sourdough Bread Recipe Card”, with a starter table, an ingredient table in grams with baker's percentages, and a hydration line, tagged in the Baking collection.
A note open at knowstash.ai: “Strategist interview: rates, the dollar, what to own”, with her four calls and a table of every number she gave, each linked to the moment she said it, tagged in the Markets collection.

Queue now, note later

Line up videos from YouTube or from a pasted link. One empty send saves them all. Ask a question and you choose what comes out: a note per video, a single note drawn from all of them, or one note the queue keeps adding to, so ten reviews become one shortlist that stays current.

Line up every video on a question: a product's reviews, a conference's talks, a competitor's launch week. One empty send saves them all. Ask a question and you choose what comes out: a note per video, one note drawn from all of them, or one note the queue keeps adding to, so every review of a product becomes one list of complaints, by feature, that stays current.

  • One note per video, or one from all
  • Or one note the queue updates as it grows
  • Save the whole queue with an empty send
  • Select a few and run just those
  • Queues run side by side, and carry on without you

Watch: One note from many videos1:11Watch: Every review, one question1:21

The Queue page at knowstash.ai: a “Japan trip” queue whose box offers one note per video, one from all, or updating the note the queue keeps, with a Suggest button, and beside the send button the price and time of saving the one video not saved yet, above the queue's videos with thumbnails.
The Queue page at knowstash.ai: an “Acme 2 reviews” queue of four product reviews whose box offers one note per video, one from all, or updating the note the queue keeps, here “Acme 2: every complaint, by feature”, with a Suggest button above the four reviews.

Put YouTube on autopilot

Point a monitor at a search, a channel or a playlist. New uploads get found, saved and noted while you sleep, either folded into one growing brief or as a note per video, and a newsletter written from the new notes lands in your inbox. You set how much one run may spend, and a preview shows which videos the next run would pick up and roughly what they would cost, without adding any.

Point a monitor at the channels and searches your market talks on: a central bank's press conferences, a competitor's channel, every new review of your product. New uploads get found, saved and noted overnight, folded into one brief that stays current or as a note per video, and a newsletter written from the new notes reaches the team's inboxes. You set how much one run may spend, and a preview shows which videos the next run would pick up and roughly what they would cost, without adding any.

  • Runs as often as every 15 minutes
  • A spending limit on every run
  • Filters for upload date and words in the title
  • One growing brief, or a note per video
  • A written newsletter by email, on your schedule
  • An activity log of every run, and what it skipped

Watch: Let new videos come to you1:39Watch: Follow an expert's channel1:44

The Monitor page at knowstash.ai for an “Electric SUVs” queue, drawn as one line of steps: monitoring on, running every day and spending at most 2 credits a run; a keyword search and the Edmunds Cars channel as sources; only titles with “review” or “test” let in; new videos saved into the queue; a note that keeps one brief up to date; and a weekly email newsletter.
The Monitor page at knowstash.ai for a “Rates & central banks” queue, drawn as one line of steps: monitoring on, running every 12 hours and spending at most 3 credits a run; the Bloomberg Television channel and two searches as sources; only titles with “rate”, “inflation”, “ECB” or “Fed” let in; new videos saved into the queue; a note for each new video; and a daily email newsletter at 07:00.

A newsletter, written from your notes

Every issue is written from the queue's new notes, with sections, headlines and short summaries that link back to the notes and the videos. It arrives on your schedule and stays in your archive at knowstash.ai. Share an issue with a link when it's worth passing on.

Every issue is written from the queue's new notes, with sections, headlines and short summaries that link back to the notes and the videos. It goes to you and the colleagues you name, on your schedule, and every issue stays in the archive at knowstash.ai. Share one with a link when it's worth passing on.

  • Instantly, daily, or weekly
  • To you and the colleagues you name
  • Sections, headlines, and links to the videos
  • Every issue kept on the Newsletters page
  • Share an issue, or the issue and its notes
A newsletter issue at knowstash.ai titled “Osaka, Kyoto, Tokyo: Where to Go First”, sent from the Japan trip queue, with an intro and sections on Osaka food, a Tokyo itinerary and Kyoto temples, each linking to its note and its video.
A newsletter issue at knowstash.ai titled “Freight rates: Asia to Europe climbs again”, sent from the Freight rates queue, with an intro and sections on Asia to Europe rates, the transpacific lane and the season, each linking to its note and its video.

A library that grows

Every video you've saved and every note you've written, in one searchable place at knowstash.ai. Collections keep topics tidy. Sharing a note is one link, and it always shows the latest version.

Every video your team has saved and every note it has written, in one searchable place at knowstash.ai. A collection per client or project keeps the work apart. Sharing a note outside the team is one link, and it always shows the latest version.

Watch: Find anything again1:14Watch: Find what was said1:20

  • Search across all your notes and videos
  • Collections, channels, and date filters
  • Every note keeps its sources and its versions
  • Public share links, revocable anytime
  • One account, one library, one balance
  • One team, one library, one balance
The KnowStash notes library: a sidebar with Home, Notes, Videos, Monitor, Queue, Newsletters, Collections and Prompts, and under them a small card saying a note is being written; a search box, filters, and a list of notes about central banks, electric SUVs and a Japan trip, each tagged with its collection.
The KnowStash notes library of a work account: the sidebar with a small card saying a note is being written, a search box and filters, and notes on freight rates, product reviews, a founder interview and market interviews, each tagged with its collection.

Notes that grow, and leave with you

A note isn't frozen once it's written. Add new videos to it and it grows, as one document with versions. Merge several notes into one brief. Everything exports as Markdown, ready for your notes app or whatever AI tool you use next.

A note isn't frozen once it's written. Add new videos to it and it grows, as one document with versions. Merge several notes into one brief. Everything exports as Markdown, ready for the team wiki, a deck, or whatever AI tool you use next.

  • Update a note with new videos: one document, versioned
  • Merge many notes into a single brief
  • Download any note as Markdown (.md)
  • Drops straight into Obsidian, Notion, or your favourite AI tool
  • Drops straight into Notion, Confluence, or your team's AI tools
A note's actions menu at knowstash.ai: Update note, Share, Copy id, Copy text, Download as Markdown, Sources, and Delete note.
A note's actions menu at knowstash.ai, open over the strategist interview note: Update note, Share, Copy id, Copy text, Download as Markdown, Sources, and Delete note.

The same app on your phone

knowstash.ai is a website, so there is nothing to install and nothing to keep in step. Open it on a phone and you get the whole thing: the library, the search, the reader, the composer, your queues and your monitors, laid out for a narrow screen instead of squeezed into one. Start a note on the train, read it at your desk. Same account, same library, same credits, and the Chrome companion for the part that happens on YouTube.

knowstash.ai is a website, so there is nothing to install and nothing to keep in step. Open it on a phone and you get the whole thing: the library, the search, the reader, the composer, your queues and your monitors, laid out for a narrow screen instead of squeezed into one. Read the brief on the way to the meeting, start a note between calls. Same account, same library, same credits, and the Chrome companion for the part that happens on YouTube.

  • The full app, not a cut-down mobile version
  • Read, search, ask and queue from a phone
  • Start on one screen, pick it up on another
  • Nothing to install, nothing to update
KnowStash on a phone: the sourdough recipe note open, with its tables of ingredients readable at phone width.
A note, on the sofa
KnowStash on a phone: the Japan trip queue, with its three note modes, the note it keeps updating, a Suggest button, and the one video still to save, its price under its title.
A queue, on the bus
KnowStash on a phone: the strategist interview note open, her calls and the table of numbers readable at phone width.
A brief, before the meeting
KnowStash on a phone: the Acme 2 reviews queue, with its three note modes, the note it keeps updating, a Suggest button, and the reviews in it.
A queue, between calls

On YouTube

Ask and save without leaving YouTube.

Your library lives at knowstash.ai and works in any browser, with nothing to install. The free Chrome companion adds the part that needs YouTube itself: a panel beside the video you're watching, and a plus on every thumbnail. You sign in with the same account, so it's one library and one balance of credits.

A YouTube video page with the KnowStash panel open beside the player: a note called “Rail pass or Suica?”, written from the video, with timestamps that jump the player to the moment, and an “Open on knowstash.ai” button. The player shows an illustration of Tokyo in place of the video.
1.

Add it to Chrome

It's free in the Chrome Web Store, and it works in Brave, Edge and Arc too. Press Add to Chrome, then Add extension.

2.

Open a video and sign in

The KnowStash panel sits beside the player. Sign in once, with the account you use at knowstash.ai.

3.

Ask, or queue it for later

Ask about the video and the note is written in the panel. Or press the plus on any thumbnail to put the video in a queue.

Watch: KnowStash on YouTube1:37

What it does on YouTube

The companion does only the things that need the video in front of you. Ask about the one you're watching and read its notes beside the player, with timestamps that jump to the right moment, and narrow a question to the chapters you actually care about. Line up a queue as you browse, with one click on any thumbnail, then send the whole queue off without leaving the page. Small badges show what's already yours, and everything else is a link away at knowstash.ai.

  • Ask about the video you're watching
  • Its notes beside the player; timestamps seek
  • Chapters, so a question covers only the part you mean
  • One-click add-to-queue on any thumbnail
  • Run a whole queue from the panel, three ways
  • Badges across YouTube for what you've saved and noted
The KnowStash panel beside a YouTube video: the Ask tab lists this video's two notes, a question about the rail pass is typed into the box, and “0.02 credits ~ 15 seconds” shows beside the send button.
Ask, beside the video
Two YouTube search results: the first carries the badges “saved”, “notes:3” and “queued”, and the second shows the red plus that adds it to your queue.
Badges, and a plus on every thumbnail

Add to Chrome → Installing it, step by step

Who it's for

For your curiosity, and for your job.

For you

Learn faster

Turn courses, talks, and tutorials into notes you can search, with the numbers, steps, and links intact.

Research across videos

Write one note from ten videos. Ask a question across everything you've saved.

Tame watch-later

Queue what looks interesting, let KnowStash save and note it, then read the five that matter.

For work

Product & brand watch

Monitor searches and channels for mentions of your product. Wake up to a brief, not to forty tabs.

Market & competitor intel

Track keywords, competitors, whole niches. The notes land in collections, on schedule.

A newsletter for the team

Follow the finance and industry channels that matter; a written issue of what was new lands in everyone's inbox.

Seven worked examples, with the exact monitor setups: use cases for work. Running something bigger? Talk to us.

1 credit
= 1 hour of video$1 / €1 a credit until 31 December 2026 · no subscription

Buy credits up front and spend them when you like. There is no subscription and no monthly fee. Packs of 10, 20 or 50 credits at the same price per credit, valid 3 months. Teams buy 100 to 500 credits a year on one invoice, for a shared workspace. Every action shows its price before it runs, and you start with 3 free credits. Until 31 December 2026 a credit costs $1 / €1: the 10-credit pack is $10 / €10, and the bigger packs come with 50% more credits.

See pricing →Watch: Your credits and account1:36Watch: Credits, spend and the Team plan1:35

Your watch-later list deserves better.

What your market says on YouTube, written down.

Create your free account, paste the first video you never had time for, and ask for the note you wish existed. The first 3 credits are on us.

Create your free account, point a monitor at the channels your work depends on, and see what arrives tomorrow morning. The first 3 credits are on us.

Start your stash → Start free → Add to Chrome Talk to sales

3 free credits to start · no card · any browser, phone included · YouTube companion for Chrome, Brave, Edge & Arc

Updates

Product news, occasionally

New features and improvements, by email, when there's something worth telling. No schedule, no spam, unsubscribe anytime. It's a checkbox on your free account: tick it when you sign up, or flip it later in Settings.

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