Turn YouTube videos into notes you will actually reuse

A good note from a video is short, in your own words, and points back to the moment it came from. A summary gets you most of the way there in seconds. The last step, deciding what matters and writing it down, is still yours, and that is the step that makes notes stick.

The 4-step method

1. Get a structured first draft

Paste the video link on sum.video or click Summarize next to the player with the Chrome extension. You get key insights, each with a clickable timestamp, plus the full transcript.

2. Pick three to five points

Read the insights and keep only the ones you would use or explain to someone. For a 60-minute lecture, five points is plenty. For a tutorial, it might be the steps and one warning.

3. Check each point at its timestamp

Click the timestamp and listen for 20 to 30 seconds. This catches the rare summary error and, more usefully, reminds you of the example the speaker used, which is often what you need to remember the idea.

4. Rewrite in your own words

Write each point as one or two sentences in your notes app, with the timestamp link next to it. If you need exact wording for a quote, copy it from the transcript tab.

Why the rewrite step matters

Copying feels productive but is not the same as understanding. In Mueller and Oppenheimer's experiments, students who typed lectures nearly word for word did worse on conceptual questions than students who had to summarize by hand (Psychological Science, 2014). A later replication found the difference smaller and less consistent (Morehead et al., 2019), but neither found that copying helps.

AI help works the same way. In a 2025 study of 30 people taking notes on lecture videos, "Intermediate AI yields the highest post-test scores and Automated AI the lowest", even though participants preferred the automated setup (Chen et al., 2025). Let the summary find the structure; do the final step yourself.

Templates by video type

Lecture or course

• Topic and the question it answers
• Three key ideas, each with a timestamp
• One example or derivation to rewatch

Tutorial

• Goal
• Steps, numbered, with timestamps
• Gotchas the presenter mentions

Podcast or interview

• Guest and why they are worth hearing
• Two or three claims, each with a timestamp
• What you agree or disagree with

Keep notes findable

Save the points you want to come back to in a Wisdom collection on sum.video, or paste them into Notion, Obsidian or your notes app. For a fuller system, see build a personal knowledge base from YouTube videos.

Notes in another language

You can get the summary in any of 17 languages, whatever the video's language. That makes it easier to take notes in your own language from an English lecture, or the other way round. See YouTube summary in your language.

Sources

• Mueller and Oppenheimer, The Pen Is Mightier Than the Keyboard, Psychological Science, 2014
• Morehead, Dunlosky and Rawson, How Much Mightier Is the Pen Than the Keyboard for Note-Taking?, Educational Psychology Review, 2019
• Chen, Ruan, Ju, Yap, Wang, More AI Assistance Reduces Cognitive Engagement, 2025