Video study notes

AI study notes from your videos

Automatic notes from YouTube, Udemy, and Coursera while you learn

Paste a lecture link, capture the moments that matter, export to Obsidian or Notion.

YouTubeAnalyzed from frame at 12:40

Lecture 4 · Roots

x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

# b² − 4ac decides it

18:2431:04

Frame 1 of 2

12:40
Binary search on a sorted list
- Halve the search window each step
- Runs in O(log n) time

3 frames analyzed1 in notes

Sources: YouTube, Udemy, Coursera
Reads: Code, equations, diagrams
Exports: Markdown, Obsidian, Notion

01 · Capture

It reads the screen, not the captions

Transcript tools only hear the speaker, so the code, the formula and the whiteboard sketch never make it into your notes. Here every captured frame goes through AI vision and comes back as markdown.

Quick scan: 12 frames sampled evenly across the video, for a first pass in minutes.
Manual capture: Hit capture, type a timestamp, or paste a screenshot whenever something matters.

Intro to databases · Lecture 63 frames

4:12

Code

Transcribed exactly, language detected

SELECT name, COUNT(*)
FROM enrollments
GROUP BY name
HAVING COUNT(*) > 3;

18:30

Equations

x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Saved as LaTeX, rendered in your notes.

27:05

Diagrams

The frame is embedded, with the boxes, arrows and labels written out as a nested list.

Request path
- Browser sends GET /courses to the API
- API checks the cache first
- Database answers on a cache miss

02 · Export

Lands in your vault as plain markdown

Obsidian notes come with YAML frontmatter, tags and aliases. Notion gets a version its paste and import understand. Every heading links back to the second it came from.

Intro to SQL joins.md

---title: "Intro to SQL joins"tags: [video-notes, youtube]aliases: [sql-joins]---## [[4:12]] Inner vs left join

03 · Ask

Ask about the part you didn't get

The assistant has read every frame you captured and your notes. Ask it to explain a step, compare two moments or quiz you, then add the answer to your notes with one click.

AssistantRead 3 frames · 4 notes

Why does the loop stop when lo passes hi?

12:40

At 12:40 the window is [lo, hi]. Once lo > hi the window is empty, so the target is not in the list and the function returns -1.

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