So I'm not sure if I'm the only one having this kind of problem, or if some others of you out there are too. But, I download videos from Youtube when I'm on Mozilla sometimes, things that I want to put into my iTunes so I can listen to them in my car. Well only recently, as in the past month or so, sometimes I'll download something onto my computer, put it into iTunes, and send it straight to my iPod. But when I'm in my car and already on the road, and looking for one particular video to listen to or something, it's just not there. I'll get home that evening and check iTunes, and the video is just staring me in the face.

Any suggestions on why this is? Or how to fix it?