Save Youtube Videos (in Multiple Formats) With a Simple URL Change

Kickyoutube provides easy downloading of youtube videos by a simple URL change:

example:

Original URL:
http://www.youtube.com/watch?v=44eDGV9y3yg&playnext_from=TL&videos=8gsnqb2pVBU&feature=grec

Modified URL (insert the word kick in front of youtube):
http://www.kickyoutube.com/watch?v=44eDGV9y3yg&playnext_from=TL&videos=8gsnqb2pVBU&feature=grec

JSDownloader will also save youtube videos if you copy the link to your clipboard and there are numerous firefox plugins that seem to do the job.