http://www.mp3-box.org/download-mp3-zune/

If you use your Zune (mp3) the first time, how do make it work to download the second?
Refering to downloading music, videos, and pics.
1. Make sure the music, pictures, and videos are in the correct format.
2. Set up automatic sync if that is what you want it to do.
http://support.microsoft.com/kb/928192/en-us
Add audio files to your Zune collection
The Zune software automatically searches for appropriate audio files, and then adds the audio files in the following formats to your Zune collection: • The following types of files: • .wma
• .wmv
• .mp3
• .jpg
• .mp4
• .m4v
• .m4a
• .m4b
• .mov
Add video files to your Zune library
The Zune software will automatically search for appropriate video files, and then add the following video file types to your library: • Windows Media Video files (.wmv)
• MPEG-4 Video files (.m4v)only some of them. It will convert some mpeg-4 files. I’ve seen it happen.
• Some QuickTime video files (.mov)
Pictures: jpeg format only
How to download youtube videos to mp3and transfer them to your iPOD,Zune…..