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 ???
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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.
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Thats all I got, since I don't do any of what your trying to accomplish.
Oh and Welcome to the Gnutella Forums.