Yes you can use iTunes for mp3s you already own. As much as Apple would love us each to buy 7,500+ songs on iTunes, the majority of us don't have the bucks to do it. It took me 20 years to amass the cd collection I have - 2500 cds. I'll buy from iTunes to fill in the missing pieces and for newer songs. I rarely buy cds now, since most of the time I only like one or two songs and not the entire cd. (What does that say about the quality of music coming out?)
As far as videos, you don't need to obtain them through iTunes but you may need to convert them into a format that you can download onto the iPod. I'm more experienced on the music end and haven't attempted to convert any video. I try to get free videos on iTunes when I can, but every once in a while I'll buy something. I also download video podcasts, which are free, through iTunes as well.
I am buying a 5.5 generation video iPod very soon. Before I do, I have a very easy question. Do you have to get your mp3s and videos through iTunes? I mean, do you have to pay for them?
Can you load the mp3s and videos you already have (e.g. on your PC hard drive) onto your iPod using iTunes? I guess I'm just curious as to what iTunes' purpose is: a medium for loading data or a medium for buying data??
Thanks in advance. I know. it might be a dumb question, especially for 2007, but I've always wanted to know!