How to take notes from YouTube videos and find them again

Most people who take notes on YouTube end up in one of two places. Either they write nothing and forget the video within a week, or they write a lot in a document that they never open again. Both come from the same gap: the notes are not tied to a purpose, a moment in the video, or a moment to review them.

This method closes that gap. It has four phases: before you watch, while you watch, after you finish, and during review. It works with a notes app, a document or a notebook. At the end, we show how ReplayGlows covers the parts that are hard to do by hand.

Before you watch: two minutes

Start with a sentence that says why you are watching. “I want to understand how interest rates change bond prices, so I can explain it in my weekly meeting.” A purpose tells you what to write down and what to skip.

Then check the shape of the video. Look for chapters, a transcript or an outline in the description. If a long video has no structure, decide in advance whether you will watch all of it or only the parts you need.

Finally, decide what you will do with the result. Choose one of three outcomes: apply an idea, explain it to someone, or make a decision. The notes you write will then be shaped by that outcome.

While you watch: notes at the right moments

Do not write during the whole video. Watch a section, then note what matters. Write a note only when one of these four things happens:

• A key claim: the speaker states something you need to remember.
• A method or a step: the speaker shows how to do something.
• A question: something is unclear, or it contradicts what you know.
• A link to your life: you can see where this applies.

Each note should contain four elements: the moment (the timestamp), the idea in your own words, the reason it matters, and, when it applies, a question or a next step. Here is a short example from a video about bond prices:

12:40. Idea: When rates rise, the price of an existing bond falls, because new bonds pay more. Why: This explains the drop in our portfolio last quarter. Question: Does this still hold for bonds with short maturities?

Writing in your own words is the step that makes the note useful. A copied sentence tells you where to look; a paraphrase tells you what you understood.

After you finish: consolidate within a day

Reread your notes the same day or the next. Then add three things at the top of the video’s notes:

1. A summary of three sentences, written from memory, before you check the video.
2. One to three questions you can answer later, starting with Q:.
3. One action if the purpose calls for it, starting with TODO:.

If you cannot write the summary from memory, the video is not yet understood. Go back to the timestamp of the notes you could not explain, and rewrite those lines until you can.

Review with spacing

A note you never revisit is a note you lose. Review it on a schedule that gets longer each time: the next day, then after three days, after a week and after a month. At each review, try to answer the question before you look at the note. Notes that you could explain easily can wait longer. Notes you struggled with come back sooner.

This is the same idea behind study cards with spaced repetition: recall works better than rereading, and reviews spaced over time work better than one long session.

Organize by topic, not by video

A pile of notes per video becomes unmanageable after a few dozen videos. Group your notes by topic instead:

• A playlist per goal, such as “fixed income basics”, containing the videos for that goal.
• A keyword per topic, used at the start of notes, such as bonds: or budget:. Search for the keyword and you get every note on that topic, across videos.
• An index note per topic, with a few lines and links to the most important notes. Update it when you add a key note.

The playlists and feeds guide shows how to keep these groups tidy as they grow.

Doing it by hand

You can run this method with nothing but a document. Create one note per video and use YouTube links with a time parameter, such as &t=760s for 12 minutes 40 seconds. Clicking the link opens the video at that point. Use a consistent format, such as [12:40] idea, so you can search for it.

The limits are practical. Timestamps are typed by hand, so they drift when you forget. Your notes live in one document per video, so searching across all of them means searching many files. And you have to maintain the links yourself. For a few videos a month, that is fine. For a serious course or project, the friction adds up.

Doing it with ReplayGlows

ReplayGlows is built around the same method, and handles the parts that are tedious by hand:

• Paste a YouTube link to open the video in the web app.
• Write a note at the current moment. ReplayGlows saves the time with it.
• Click any timestamp to reopen the video at that point.
• Filter all your notes by keyword on the Notes page, across every video.
• Read the transcript when YouTube captions are available, to find a passage quickly.
• Create a study card from a moment, with a question and an answer, so the idea comes back for review.
• Group videos into playlists and feeds for each topic.

The features page lists everything the web app does today. A few honest limits apply. Notes are saved to your account, so you sign in to see them. The Free plan includes 10 videos, 50 notes per video and 3 playlists, and 50 study cards, with up to 10 cards per video. The Pro plan costs $8 per month or $72 per year.

The Chrome extension adds a separate layer: YouTube bookmarks and notes saved in your browser, which you can export as Markdown or JSON. If you compare note-taking tools, the comparison page lists what each option covers.

A simple starting routine

To begin this week, use the method on one video:

1. Write your purpose in one sentence before you press play.
2. Write three notes at moments that match the four types above.
3. Tomorrow, write a three-sentence summary from memory, and one question.
4. Review again in three days.

After that, the habit matters more than the tool. Choose the setup that you will actually use, whether it is a document or ReplayGlows, and keep the four phases.