了解文件格式。 使用Apple的软件进行转换。 下载第三方软件。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Your iPod can only play .m4v, .mp4 or .mov files.  Your video should be a .mov file.  If it doesn't have this extension, you'll need to convert it. Otherwise, simply open it in iTunes and sync to your iPod. If you're using a Mac, you can use QuickTime Pro to convert your file into an iPod-friendly format.  Download and install QuickTime Player Pro 7.0.3 Select or import your video file. Select File->Export  From the Export drop-down list choose Movie to iPod. A new file will be created on your D