This is my first review for an add-on, because I never felt the need to, but this add-on is truly amazing! I've been trying multiple websites and add-ons to try and download YouTube videos in HD after they changed to separate audio and video streams, but nothing works. I was first skeptical when I needed to donate to get pro to download in HD, but thought I would refund through PayPal if it was fake. To my amazement I was able to download YouTube videos in HD now! The add-on is also very convenient adding the download button at the bottom of the video instead of in the taskbar. Support the developers to keep the service running and thanks to the awesome developers!!