KeJi - Video Lesson Notes

Playback controls, end-of-lesson alerts, local progress and notes for web video courses. Data stays on this device.

KeJi is a small notebook for video lessons. Write a note while a lecture plays and it remembers the exact second. Click the note later and the video goes back to that moment, even if the page was closed or the player is inside an embedded frame. • Notes keep the video's time and are grouped by video • Use a popup, a draggable floating panel, or the browser side panel • Pauses the video while you type, resumes after you save (optional) • Speed slider from 0.5x to 2x, optional per-site speed memory • Take a note in fullscreen with Alt+Shift+N • Optional alert when a lesson ends • Right-click selected text to save it as a question • Search notes, mark items to review, export as Markdown • English and Chinese interface Everything stays on your device: no account, no server, no analytics. KeJi never fakes watch time or completion. It works with standard HTML5 video, including players inside iframes; not every site's custom player has been tested.