I installed the Video Downloader extension for Android on my Samsung A8 tablet. But since I can't find any directions for it I can't get it to work. I've disabled every other extension that's installed for this device; there's only 3 other extensions installed: uBlock Origin, Adguard Adblocker and Ghostery Tracker & Ad Blocker, and they're all disabled. Ordinarily, I wouldn't even care, but the Video Downloadhelper extension for Firefox desktop/windows has suddenly quit working, so I was hoping to get this extension working until I can figure out why the desktop extension has quit working.