This is a commercial product! Converting costs real money, and the product does not recognize the 4K formats in spite of a lot of settings. Just compare with Flash Video Downloader and see what they find on YouTube videos, but the worst thing is scrounge the money. Install an additional file with codec and converter, because you will not download anything.After you install it, you will find out that you will download in an interesting format you will pay! Super! I lost only time, because stupid Mozilla can not distinguish paid offers!