I can see what you're trying to do with the QR code thing. But if its covering almost half of the video making the video useless and 30 dollars for the license to remove the QR code then the program isn't free.
To those reading, I recommend "4K Video Downloader", the only limit is 10 free downloads per day before they ask for payment and NO watermarking. Which I thought was so reasonable that I do subscribe the $15/year unlimited license even though I don't even download that much. They also have much better features.