padhan3231/classplus-video-download-suite ? reverse-engineered prompt

Build me a small personal use toolkit that lets me save videos from my legally purchased Classplus courses for offline viewing. I want it to work like a simple pipeline. First it should help me grab my login token, either by opening a browser session, giving me a browser console snippet, or letting me paste it manually from network requests. Then it should crawl through an entire course, including nested folders, and collect every video into one manifest.

After that, I want both a single video downloader and a bulk downloader that can turn the video streams into mp4 files without re encoding. Please make the bulk download resumable, skip anything already finished, save checksums and metadata in json and csv, and mirror the course folder structure on disk. It should retry temporary failures, stop cleanly if auth breaks, and pause if free disk space gets too low. A simple progress checker would be great too. Use the repo scripts as the base, and look up current docs online if needed.