Downloading large YouTube playlists in parts

It would be a nice feature to have if you want to download a large YouTube playlist (for example 4000+ clips) you can enter a "from clip xxxx" and "to clip xxxx" before you commit to the download.

I've tried downloading the specific list in one go, but my computer turns into a fighter-jet blasting it's engines at full throttle and crashing before getting even anywhere near half the list even with threads set to 1 :)