A shell script for automatic downloading your YouTube playlist.

youtube-dl.sh

#!/bin/bash

# Use $ which youtube-dl to get the path.
youtube_dl_path=/usr/local/bin/youtube-dl

# https://askubuntu.com/a/157787
if ps aux | grep -v grep | grep $youtube_dl_path > /dev/null
then
    echo "youtube-dl is running"
    exit 1
fi

# Change these settings accordingly.
base_folder_video=/home/tonni/Videos/
base_folder_archive=/home/tonni/youtube-dl/

download_playlist () {

    # https://stackoverflow.com/a/1401495/4480674
    current_date=`date +%Y-%m-%d--%H-%M`

    $youtube_dl_path \
        $1 \
        --output "${base_folder_video}${2}/${current_date}__%(uploader)s__%(title)s.%(ext)s" \
        --download-archive ${base_folder_archive}download_arachive_${2} \
        --ignore-errors \
        --write-sub \
        --format best \
        --proxy socks5://127.0.0.1:1080
}

# Change 
download_playlist "Your_unlisted_playlist_url_1" "playlist_name_1"
download_playlist "Your_unlisted_playlist_url_2" "playlist_name_2"