Thank you! It's a regular video recording, and then I noted down the chapter timestamps in an array. (see heroVideoChapterStartTimesSeconds at the very top of

Thank you! It's a regular video recording, and then I noted down the chapter timestamps in an array. (see heroVideoChapterStartTimesSeconds at the very top of https://retcon.app/main.js https://retcon.app/main.js) As the video is playing, the player uses this to know what chapter to highlight, and how much to fill its progress bar. (that's updateVideoChapters())