A progress bar that proves nothing
(01) The problem
A long lecture video can teach you a lot. But when it ends, you cannot say what you really learned. Most study tools show a bar that fills as you read. A full bar only proves the words got printed, not that anything landed.
(02) What I built
I wrote a tool that listens to a long video, reads what is on the screen, and turns it into a course. It teaches one idea per turn, ends with one question, and stops. The question is one you have not seen, and it wants your own words. Typing okay does not count.
Both pictures are drawings of the real thing, not photographs. The shape is what runs; the video and the answers in them are made up. The file itself is public, so you can read every rule it follows.
(03) What went wrong
A finished answer is not a finished video.
I check the last minute it heard against the real length of the video. Then I read the reason the answer stopped. It comes back with every reply.
It checks two things before it teaches. Was the answer cut short, and does what it heard reach the end. It asks for the rest, and marks each idea heard, partial or missing.
(04) What happened
A lesson built on half a video says so out loud. You can see what it missed.