It is very easy. You only need a couple of utilities to accomplish this. One utility is to download video off of YouTube (the FLV file) and another to convert the file to a Zune player compatible video. The following are steps to transfer YouTube video to Zune:

Download YouTube, Google, Myspace, iFilm, etc. video files and save as the FLV file and convert to Zune and other popular file formats

For Internet Explorer (PC) users

Find a favourite video clip, copy the url link which is located right below the video you've chosen and paste it to the “URL:” box from the site . After clicking on the “search” button, [Download Link] would be showed. You only need to right-click the [Download Link] and save the file.
Note: rename the file extension from *.php to *.flv when saving it. So, the FLV video file was saved to your computer.The FLV file isn’t widely used, so you need to download a special player to play the file. Freeware FLV Player is highly recommended. Download FLY Player

For Internet Explorer (Mac) users

Search your hard drive for a file called "get_video". You can use Spotlight to find the file.

Copy it to your Desktop. Rename the file extension from *.php to *.flv.

Please note: There is another method to download videos from YouTube, Google Videos, iFilm, Metacafe, Dailymotion, MySpace, etc. Use the VideoDownloader plugin for Mozilla Firefox to download all your favorite videos.

How to convert the FLV files to Zune wmv

There are many programs to convert the FLV file. Mac users may look at iSquint. It's a free application. Windows PC users just download the FLV Converter. It can convert FLV to Zune WMV, FLV to AVI, FLV to MPEG, SWF, iPod, PSP, MP3, M4B, M4A, etc.

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ImToo Zune Converter is also a nice program which supports converting DVD and various video/audio files to Zune (WMV, WMA). If cucusoft doesn't work great on your computer, take a look at the following guides and download it to have a try.

• Unbiased Review of Microsoft Zune 30GB Media Player

• How to convert video and audio files to Zune WMV, WMA, etc