iTunes has to be used if you want any video, music, or pictures on any apple iPod.
A big misconception is that any mp3 player is an iPod. This is not true. iTunes will not connect to any product outside of apple.
What does iTunes do?
Library for your music
Library for your videos
Listen to Podcasts
Listen to a selection of radio stations
Access the iTunes Store
if you are familiar with Windows Meida player, it does the same things... but more!
What are Podcasts?
Dictionary.com: podcast — n 1. an audio file similar to a radio broadcast, which can be downloaded and listened to on a computer, mp3 player, mobile phone, etc It lamiens terms it is a cool way to keep up in the news in areas of your choice. My choice is the PTI Podcast. (A popular ESPN show) Some are free, while others you have to pay for... so pay attention.