Download YouTube Videos to iPod
CNET has a good video tutorial for newbies on how to download YouTube videos with Real Player 11 ripper, then convert the YouTube video to MPEG-4 format using MoviePod and finally put the YouTube videos to your iPod using iTunes. Not for your Nano or Shuffle though.
You can also use the free Tooble to download YouTube videos.
Related: Real Player vs Adobe Media Player