Using YouDown is very simple. Just launch it and add as many YouTube video URLs as you want. Then select the quality and destination where you want the videos to be saved and hit the Go button. This tool will handle all downloads for you. You can choose one from Low Quality, High Quality, and High Definition qualities. High Definition would be the better for your desktop viewing.
Hit the Go button and the videos will be processed. It will begin downloading them one by one. YouDown is compatible with Windows 7, Windows Vista, and Windows XP. It’s a freeware that can be downloaded from here.