if running firefox use dwhelper addon https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/ this will allow to save the youtube video to your pc then use this site 100% free to convert the file to avi mp4 etc http://www.online-convert.com/ convert and save to your pc find your save version and burn to dvd............you can also use this method for music say you download music from youtube via dwhelper and you want just audio for cd mp3 players ipod etc just convert using the audio convertor this method takes a bit but it is a safer than downloading music and risking getting copyright infringement issues