NTU COOL Video Downloader

NTU COOL Video Downloader is a small, focused Chromium extension that saves native NTU COOL course videos you are already authorized to watch as MP4 files with audio. Sign in to NTU COOL normally, open a native video, and press the extension download button. You can also open the batch page from the extension context menu and paste multiple direct video-page URLs. The extension selects the highest resolution offered by the platform, downloads and combines video and audio in the browser, then hands the finished file to the browser's normal download manager. • Does not automate login or read cookies or passwords • Does not bypass login, access control, or DRM • Does not support YouTube embeds • No analytics, telemetry, ads, or external services • All MP4 assembly happens locally in your browser • English and Traditional Chinese UI, following light or dark mode • Only for content you are legally authorized to access This is an independent open-source project and is not affiliated with or endorsed by National Taiwan University.