Hmm. Great Question, But....Might try Google since your asking about YouTube and Ipod.
Can't figure out why this would be Relevant on the Gnutella Forums ???
Usually it takes some sort of Software Prog. to D/L Y/T Vids. I Think. ??
I can come up with some if you need help.
Thats all I got, since I don't do any of what your trying to accomplish.
Oh and Welcome to the Gnutella Forums.