Need You Tube Downloader For Mac????

[tannulee]

hello i am looking for youtubedownloader for mac to download youtube videos in
my pc and convert them to mp3 to listen them in my ipod too, can you help me pls? Also I've downloaded youtube download mac to try to use a video in a presentation I am giving. I know I properly downloaded the program since it is in my Mozilla Download window. Where will I find the "You Tube Downloader" program to help me download the videos? How do I now download the videos from You Tube? Thanks.