Total waste of time unless you are willing to pay for their premium, the add-on simply doesn't work for YouTube currently unless you go out of your way to install the beta version, then in order to download it they make you install something else too, then finally they notify you only after downloading the video that "oh sorry we forgot to tell you we want your money so here is a QR code watermark that takes up 20% of the videos screen. LOOK ELSEWHERE.