If you want to convert DVD to iPod on Mac OS X, you can learn more from this detailed guide How to rip DVD to iPod on Mac OS X
Here is something about iPod supported video and audio format that we should know:
iPod Video formats supported:
MPEG-4 video
H.264 video
Audio formats Suppoerted by iPod:
MP3,AAC,WAV
So if your videos aren't compatible with iPod MP4, you need the third party software to convert video to iPod on your Mac
What your need is Aimersoft Video Converter for Mac, you can free download it from its official site:
http://www.aimersoft-mac.com/video-converter-mac.html
Part 1. Convert Video to iPod on Mac OS X
Step1. Install and run Aimersoft Video Converter for Mac, click the "Add" button to import your videos. This Video Converter for Mac support batch conversion, so you can import multiple files at a time.

Step 2. Then Click the "Format" drop-down list to select the format you prefer for each added file. If you don’t know what formats your device support, you can just select the format “iPod Video MPEG-4 (*.mp4)”, and the default settings will just work perfectly.
Step 3. After all things done, click "Start" to start conversion.
If you want to learn more functions about Aimersoft Video Converter for Mac, you can refer to this article - how to convert video and edit video on Mac OS X
Part 2. Put Video on iPod with itunes
If you want to add video to iPod with iTunes, follow these steps:
1. Open iTunes and click "File" to add your videos to iTunes library.
2. plug in your iPod to computer, then iTunes will detect your iPod as a device.
3. Select your iPod device on the left panel of iTunes, click "Movies" tab, check the videos you want to sync and click "Apply", done.
Related articles - How to download Youtube Video and extract Youtube video to MP3 for iPod on Mac













