Install the official Learnyst app from the Google Play Store (Android) or Apple App Store (iOS). Note: Learnyst powers many white-labeled apps. Your specific course may have its own branded app (e.g., "ACME Learning App").
If you are on a computer and the download button is missing, you can attempt to use browser extensions designed to detect media streams. Install an Extension : Add a tool like Video DownloadHelper (available for Chrome and Firefox) or Video Downloader Professional Play the Video how to download learnyst videos