$ youtube-dl -o '%(playlist)s/%(playlist_index)s - %(title)s.%(ext)s' \
  https://www.youtube.com/playlist?list=PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re

$ youtube-dl -o '%(uploader)s/%(playlist)s/%(playlist_index)s - %(title)s.%(ext)s' \ 
  https://www.youtube.com/user/TheLinuxFoundation/playlists

  $ git clone https://github.com/pleycpl/youtube-playlist-scraper  # First download repo
  $ cd youtube-playlist-scraper         # changed active directory to repo
  $ virtualenv -p python3 venv          # create virtual enviroment
  $ source venv/bin/active              # actived virtual environment
  $ pip install -r requirements.txt     # download requirement packages.

  $ python3 main.py https://www.youtube.com/user/<channelName>/playlists requests  .            # Crawling with request package, then download all mix in '.'
  $ python3 main.py https://www.youtube.com/user/<channelName>/playlists selenium  ~/Videos     # Crawling with selenium package, because js. Then download all mix in '~/Videos'