Quizzes — from what the video says

Questions that quote the line they came from, answered from memory rather than picked from a list. Built once per video, then retakes are free.

A quiz built from what the video actually says. Every question quotes the line it came from, and we check that line really exists before you ever see the question. There are no options to pick from: you answer from memory, then compare with what the video said. Built once per video, then retakes are free — the marking happens in your browser, offline, with nothing sent anywhere.

Taking one

1. On any video row, press the Study chip and pick Quiz. It opens in the same box the Overview and Transcript use, so nothing on the card moves until you ask.

2. The panel opens on a Build my quiz button rather than on a quiz — pressing Study never spends anything by itself, and the button says what building one costs before you press it.

3. Write an answer to each one — two or three sentences is plenty — then press Reveal. Nothing is shown until you commit to the whole paper: revealing answers one at a time turns a quiz into a tutorial, and the recall is the point. Leaving one blank is allowed; it counts as missed.

4. Each question then shows what you wrote, what the video said, and the caption line it came from. Mark yourself — I had it or Not quite — and press Save score. Every question also carries a Rewatch from button that jumps the video to where the point is made.

Asked while you watch

The start card has one option, and it is on by default: Ask me while I watch. With it ticked, your quiz isn't a page of questions afterwards — the video pauses and asks you one each time you reach the part it came from, then plays on. You can switch it either way at any point, even halfway through a paper: the questions move between the panel and the player, and the answers you have already given come with them.

• Each pause lands at the end of the line the question was written from, so it never interrupts the sentence it is asking about.

• A question only fires if you played up to it. Scrub past a stretch and nothing pops up about material you deliberately skipped.

• Questions that need the

  whole

  video — the ones comparing the start to the conclusion — are held back to the end rather than asked early. Asking one of those halfway would spoil the video and be unanswerable at the same time.

• The card asks the same way the panel does: a box to answer from memory, and a Needed for: line saying what later material assumes you understood here. Once you submit it shows the answer, the line it came from, and a Rewatch from button that replays the passage.

• Ctrl+Enter submits, Esc always skips, 1 and 2 mark your answer once it is revealed, Enter carries on, and pressing play puts the card away. A skipped question counts as missed.

Your score arrives the same way either way: the run marks itself as the video finishes and files an attempt, so it shows up on the card and in your course numbers exactly as a quiz you sat in the panel would.

Why the questions can be trusted

A model asked for twenty-five questions about a ninety-minute transcript will invent some. That is not a flaw to be prompted away — it is what happens under load, and an invented question is wrong in the worst possible way: it tells you that you misunderstood something the video never said.

So each question has to carry its evidence, and we verify it:

• The model must copy a verbatim span of the captions into every question.

• We search the transcript for that span. If it isn't there, the question is discarded before it reaches you — which is why you may get twenty-two questions rather than twenty-five, and why the panel says so.

• A quote shorter than four words is rejected even when it matches. “the model” appears in almost any transcript, so a short quote would pass the check while proving nothing.

• The timestamp on each question is not the model's. We take the one where the quote actually occurs, so a question can never point past the end of the video.

Retakes are free, and they're a different paper

One build makes twenty-five verified questions. A quiz is a sample of them — ten by default — so Retake draws a fresh set from the same pile. No AI call, no network request, no limit. That is a deliberate design rather than a generous accident: it is what makes one generation worth paying for.

Across a whole course

☰ → Study in the panel header opens the course view, where a Quiz tab gathers every score you've earned in this course: how many of its videos you've quizzed, how you average at your best, and — the useful one — the concepts you keep missing, worst first, aggregated across every attempt rather than taken from the last one.

One wrong answer is noise. The same concept missed three times out of four is something to go back and rewatch, and that is the only thing this view is trying to tell you.

Quizzing the whole course

The same tab can also set you one paper drawn from every video — spread across the course rather than piled into whichever video came first, with each question labelled with where it came from. It marks the same way, retakes the same way, and the result is filed against each video individually, so it shows up on the cards and in the numbers above exactly as if you had taken them one at a time.

What it costs

Questions