Lately there's been a change that adds a QR code overlaid on top of the downloaded video. The QR code only shows up on videos where the option to download is an ADP variant. The only option to get rid of the QR code on ADP variants is to buy a license. it wouldn't be such a problem if other formats where offered, but on many websites Video Doawnloader only offers the (now to be paid for) ADP variant.