1
Click the Extensions puzzle icon
Open the puzzle-piece menu in Chrome's top right corner. This shows every extension that is installed but not yet pinned to the toolbar.
First run setup
Turn your next YouTube lesson into a study pack.
Pin the extension, open a YouTube video with captions, and create timestamped notes, flashcards, and a short quiz from the transcript.
Free: 3 study packs per week
Pro: $5/mo or $29/year
No account needed for the first pack
youtube.com/watch?v=fNk_zzaMoSs
How linear algebra actually works · Gilbert Strang
YouTube Study Notes Pro
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How linear algebra actually works · Gilbert Strang
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How linear algebra actually works · Gilbert Strang
MIT OpenCourseWare · 47:21 · pack saved locally
Outline
Flashcards
Quiz
Transcript
0:00 · What is a vector
A vector is an arrow with both magnitude and direction.
4:18 · Linear combinations
Two vectors span a plane when not parallel.
11:02 · Linear transformations
A function that preserves vector addition and scalar multiplication.
22:46 · Matrices as transformations
Matrix columns are where the basis vectors land.
FLASHCARD 3 OF 12 · LINEAR ALGEBRA
QUESTION
What does a matrix represent geometrically when applied to a vector?
ANSWER
A linear transformation whose columns describe where the original basis vectors land in the new coordinate system.
Again
Hard
Good
Easy
QUESTION 2 OF 8
When a 2x2 matrix is applied to a vector, what do its two columns represent?
AThe eigenvalues of the matrix.
BWhere the original basis vectors land after the transformation.
CThe dot product of the input vector with itself.
DA constant scalar multiplier applied to every component.
⌘F basis vectors
0:18Today we're going to build up linear algebra from the geometric picture.
1:42A vector is an arrow with both magnitude and direction in a coordinate system.
4:18Two vectors that are not parallel span an entire plane.
11:02A linear transformation preserves vector addition and scalar multiplication.
17:38You can fully describe one by what it does to the basis vectors.
22:46The columns of the matrix are exactly where the basis vectors land.
Get the first pack working.
Three clicks to pin and launch. Do them once, then the workflow is one button on any captioned YouTube video.
2
Pin YouTube Study Notes Pro
Find the extension in the dropdown and click the pin icon next to it. The icon now sits in your toolbar so it is one click away on every YouTube tab.
3
Open a captioned video and click the icon
On any YouTube video with captions, click the pinned icon. The popup shows the video, your weekly quota, and a Create study pack button. Press it to get a timestamped outline, flashcards, and a quick quiz.
What the pack contains.
The product is built for study, not a generic summary wall. Every output keeps the source timestamp.
Timestamped outline
Sections are grouped from the transcript with links back to the exact moment in the YouTube video.
Flashcards and quiz
Each pack includes short recall prompts and multiple-choice questions, generated locally from the transcript.
Saved moments
Mark a useful timestamp while reviewing, then jump back later without scrubbing through the whole video.
PDF, Markdown, and Anki CSV
Export clean files for offline review, Obsidian, Notion, or Anki. Pro also unlocks long-video mode.
Free and Pro are clear.
No lifetime cap surprise. No required account. The free tier is usable, and Pro removes limits for regular learners.
Free
$0 / week
- ✓3 study packs per week
- ✓Outline, transcript, flashcards, and quiz
- ✓Local saved library
- ✓Timestamp links back to YouTube
Pro
$5 / month
- ✓Unlimited study packs
- ✓PDF, Markdown, Anki CSV, and JSON export
- ✓Long-video mode for 1h+ lectures
- ✓$29/year option for regular use
Privacy and permissions.
The extension should feel boring here. It reads only what is needed to create a pack after you click the button.
Local packs
Study packs, notes, and settings are stored in chrome.storage.local on your device.
Current tab only
The popup reads the YouTube video you are currently viewing after you click the toolbar icon.
Exports you request
Downloads are used only when you export Markdown, Anki CSV, JSON, or printable files.
Caption tracks
The extension reads YouTube caption tracks for the selected video. It does not require Notion, Google Drive, or a cloud account.
Shortcuts and troubleshooting.
Keep these two shortcuts handy, and use the checklist if a video does not expose a readable transcript.
Fast access
Open the latest pack or capture a moment without hunting through Chrome menus.
AltShiftY
Open pack
AltShiftM
Capture moment
If a transcript cannot be read
Use a video with a real caption track, reload the YouTube tab after installing, or try another available caption language. Burned-in video subtitles are not readable as transcript text.
Export-ready study files.
Pro export keeps the structure useful outside the extension.
More Peak Productivity tools.
Other small utilities that pair well with learning, research, and browser work.