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Turn any YouTube lesson into a quiz.

Pausly is a YouTube quiz generator built for studying. Paste a lesson link and it writes questions from the video's transcript, with an explanation for every answer. Turn on Focus Mode and Pausly pauses the video at the right moments to ask, then shows you where to rewatch if you miss.

Which lesson do you want to be tested on?

Choose a video with captions or a transcript.

Your link stays in this browser while you sign up. Account required; creating a quiz uses your weekly usage. Privacy policy

From a link to a quiz in three steps.

  1. 1

    Paste the lesson

    Any public YouTube video with captions or a transcript works. Your link is kept in this browser while you create your account.

  2. 2

    Set up the quiz

    After sign-in, the video opens with quiz settings ready. Pick 1 to 20 questions and one or more of easy, medium or hard. Nothing is created until you confirm.

  3. 3

    Answer, then check

    Answer each question before you read its explanation. The ones you miss show you which part of the lesson to go back to.

Real questions from a real lesson.

These come from 3Blue1Brown's “But what is a neural network?”. Pausly generated them for Focus Mode, which shows each one when the video reaches its timestamp. They appear here exactly as generated.

Paused at 9:59 · Multiple choice

A detector rewards bright central pixels but also fires for a uniformly bright image; what change would make it favor a bright center with darker surroundings?

  • Give surrounding pixels larger positive weights
  • Give surrounding pixels negative weightsCorrect
  • Set every surrounding weight to zero

Negative weights on surrounding pixels subtract from the weighted sum, making the detector respond most strongly to a bright center against darker surroundings.

Missed it? Rewatch from 9:08.

Paused at 10:57 · Multiple choice

A neuron should become meaningfully active only when its weighted sum exceeds 10; what should be added before the sigmoid?

  • A bias of +10
  • A bias of -10Correct
  • A factor of 10 multiplying the sum

Adding -10 shifts a weighted sum of 10 down to 0, where the sigmoid begins transitioning strongly upward.

Missed it? Rewatch from 10:24.

Paused at 12:12 · Fill in the blank

A fully connected layer has 16 neurons, each connected to 784 inputs. It contains ___ weights, not counting biases.

  • 12,544Correct
  • 12,560
  • 800
  • 784

There are 784 × 16 = 12,544 connection weights. Adding 16 would incorrectly include the biases.

Missed it? Rewatch from 11:38.

Why quiz yourself on a video?

Watching a lesson feels like learning, but recognising an explanation is not the same as being able to produce it. Answering questions from memory, known as retrieval practice, is one of the most reliable findings in learning research. In a 2006 study by Roediger and Karpicke, students who were tested on a passage remembered more of it a week later than students who spent the same time studying it again. A quiz made from the lesson you just watched turns that finding into a habit: answer first, then read the explanation. The questions you get wrong are the useful part, because they show you which idea from the video has not stuck yet. For the whole method, read our guide on how to study from YouTube videos.

What does a good question from a video look like?

A useful question asks you to use an idea, not to repeat a sentence. Look at the questions above: one asks you to apply the rule a network uses to pick its answer, one asks you to predict how a detector should change, and one asks you to calculate a number the lesson never states outright. Each answer comes with a short explanation, so a wrong answer still teaches you something. Questions are written from the transcript, which means an equation or diagram that only appears on screen may not be covered. Videos with clear narration make the strongest quizzes.

A quiz after the video, or questions during it?

Pausly gives you two ways to practise with the same lesson. A quiz is a set of 1 to 20 multiple-choice questions you take when you are ready, at easy, medium or hard difficulty, with an explanation for each answer. Focus Mode works while you watch: it pauses the video at moments chosen from the lesson, asks a multiple-choice, fill-in-the-blank or open-ended question, then carries on. Use Focus Mode the first time through a lesson, when staying attentive matters most, and take a quiz afterwards or the next day to check what you still remember.

Before you make your first quiz

Which YouTube videos work?

Public videos with captions or an available transcript. Pausly reads what is said, not what is shown, so silent demonstrations and equations that only appear on screen may be missed. Private, unavailable or caption-free videos may not work.

How many questions can I make?

Up to 20 per quiz. You choose the number of questions and one or more difficulty levels before anything is created.

Can the questions be in another language?

Yes. You choose the language the quiz is written in, and it can differ from the language of the video.

Is it free?

You can start for free. Creating a quiz uses part of your weekly usage, and Pro gives you more.

Does Pausly pause the video for every question?

Only in Focus Mode, which you turn on yourself. Without it, the video plays normally and you take the quiz whenever you choose.

Is every question correct?

Most are, but AI can misread a transcript. If a question or its explanation looks wrong, check it against the video; the explanation tells you what the answer is based on.

Test yourself on the next lesson you watch.

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