how to download from youtube

If u don't have IDM in your computer to download youtube video clips...........
1.copy the URL (ex:-http://www.youtube.com/watch?v.......)
2.go to one of these easy online download sites
                                         http://keepvid.com/
                                         http://www.savevid.com/
3.paste the links on the text filed
4.now your download begin..........................................