youtube videos???

I have a bunch of private never-before-seen videos on youtube that I want to download. I tried keepvid but it doesn't work for private videos and I don't want to make them public. does anyone know of any good software that I can use?

if I get them, i'll post some of what I have.:)

Use Mozilla browser and get the add-on Video DownloadHelper ::great

thx man upping to mega right now.

clipconverter.cc is the way to go now. Especially if you wanna download rare video versions of songs in mp3 forms.