Train.
AI turns any educational video into a course: questions inside the player, wrong answers rewind to the exact spot.
Checkpoint. What does this print?
log("1"); setTimeout(() => log("2")); log("3");
Not a player. A trainer. #
The video asks the questions
Chapters get cut automatically. The player s itself at checkpoints. You never decide when to test yourself.
Six ways to ask
The player never repeats itself twice in a row.
Rewind to the eureka moment
AI finds the exact 30-second segment instead of saying «watch it again».
Chapters unlock like a map
Weak answers hide what's next, strong ones unlock an insider take.
Per-concept progress
Not «53% of the course»: useEffect 30%, useMemo 80%.
A boss-fight at the end
Coding videos end in a browser editor with Jest tests: no pass without green. Everything else gets a final exam graded by AI.
8 tests passed
Three steps from link to course #
- 1
Paste a link
YouTube, Vimeo, direct .mp4. Captions or not: Whisper picks up videos up to 140 min.
- 2
AI builds the course in 60s
Chapters, varied checkpoints, secret branches, a final boss-fight.
- 3
Learn and see your gaps
Player s on questions. Wrong answers rewind. A health bar shows where you're weak.
Ready to learn the way they should've taught from day one? #
Paste a link, get a course, start training for free. Upgrade when you outgrow 30-minute videos.