I for one never have installed on my pc any YouTube Downloader or Converter just to capture and save YouTube Videos to my pc. Whenever I have to download YouTube videos I just use some online YouTube Downloader website, YouTube mp3. Here take a look at it:
http://www.youtube-mp3.org
It is an online YouTube Downloader and it can capture and convert YouTube videos to mp3. You copy-paste the link of the YouTube video u need to save on your pc, press convert and it converts YouTube to mp3 and you can just save it on your pc.
Good enough for me, don't need to find some other YouTube Downloader just to download YouTube videos.
This is probably not the YouTube Downloader you were searching for to handle your YouTube Downloads but who knows, maybe you'll find some use for it.