There is a much easier way to download from youtube. Go to the website
KeepVid: Download and save any video from Youtube, Dailymotion, Metacafe, iFilm and more! and copy the URL of the video you want to download. Plug the video URL into the bar on the keepvid page and it will create different types of video files. If you don't want the video only the audio the website just added the ability to download as an mp3. Hope this helps and thanks for all the ideas.