Download and install Rockbox on your Ipod nano. Then you can convert your videos with winff to the Rockbox ipod nano 4:3 format
Step by step guide about converting DVD, Videos, Flash and Youtube videos to iPod: http://www.topsreviews.com/guides/cucusoft-dvd-to-ipod-converter-suite-guide.html
you have to convert them to mp4 format then put them on your ipod through itunes. I have a ipod nano 1st gen. you can try Zamara.com.
The current iPod Nano does not play videos.
look on youtube
When connected to a Mac the iPod Nano's videos are put into iPhoto, on a Windows computer they will go to some photo software depending what you have installed.
1st and 2nd generations..no but the new ipod nanos 3rd and 4th yes you can
you have to put in your code
The first generation ipod nano can play music only. So, you just can copy videos onto 1G nano, as memory storage. If you want to play MV onto 1G nano, you need to extract audio from the video.
Yes, just go to mediaconverter.org, download the YouTube videos, add the vieos to your iTunes library, sync your iPod and you will see the YouTube videos.
The nano comes with games, put it depends on the version you have in order for it to play video or buy new games
Yes, you can add videos to your iPod Nano. If your video is already in mp4 format, you can drag and drop it into iTunes library. Plug in your iPod to computer, iTunes will detect the iPod automatically, then click iTunes menu "File -> Sync iPod", the mp4 video will be transferred to your iPod.