I want to buy an mp3 player and am looking to get either a Zune or Ipod video... which one?

I'm going to use it solely for the purpose of watching videos, so most of my friends say zune would be better. But the only backside is that i have a lot of videos on itunes. Is there a way I could get it on the Zune? Someone said you can save them as a file and upload them on the Zune software, can you do this?