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A useful note does more than repeat what you heard. It gives you a way back to the idea when you need it.

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Start with one question: what am I trying to understand? That question becomes a filter. You do not need to save every sentence.

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When a passage answers your question, keep the original words and its timestamp together. You can return to the video to check the context.

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Then add a short note in your own words. Explain why the passage matters, or connect it to something you already know.

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The result is a smaller, more useful set of notes: a few ideas, a little context, and a clear place to continue.