This utility allows you to download all the playlists from a channel on Youtube.
Depends only on youtube-dl.
youtube-dl-channel USER [DESTINATION]
Download files from the repo
git clone https://github.com/jdupl/youtube-dl-channel.git
cd youtube-dl-channel
Execute the install script
sudo ./install-youtube-dl
sudo curl https://raw.githubusercontent.com/jdupl/youtube-dl-channel/master/youtube-dl-channel.py -o /usr/local/bin/youtube-dl-channel
Give execute rights
sudo chmod a+x /usr/local/bin/youtube-dl-channel
Don't forget to install youtube-dl.