Shell script cron job to download YouTube videos from your subscription feed

youtube-dl-cron.sh

#!/bin/bash

#
# Script to keep downloading YouTube videos to your computer using youtube-dl:
# http://rg3.github.io/youtube-dl/
#
# Put it to work:
#
#     sudo wget "https://gist.github.com/vmassuchetto/10338703/raw" -O /etc/cron.hourly/youtube-dl-cron.sh
#     sudo chmod +x /etc/cron.hourly/youtube-dl-cron.sh
#     sudo service cron restart
#

YOUTUBE_EMAIL="youremail@gmail.com"
YOUTUBE_PASSWD="somepassword"

YOUTUBE_DL="/path/to/youtube-dl"
YOUTUBE_DST="/path/to/download/directory"
YOUTUBE_DATE=`date "+%Y%m%d" -d "4 days ago"`

#
# Uncomment this to download only when you have some specific IP address
# (to not download at work, for example)
#
# IP=`/sbin/ifconfig | grep "192.168.0.170" | wc -l`
# if [[ $IP -eq 0 ]]; then
#     echo "not in 192.168.0.170"
#     exit
# fi
#

# Chec if there's a running instance of youtube-dl

RUN=`ps aux | grep python.*youtube-dl | grep -v grep | wc -l`
if [[ $RUN -gt 0 ]]; then
    echo "some instance of youtube-dl is already running"
    exit
fi

cd "$YOUTUBE_DST"
$YOUTUBE_DL \
    --ignore-errors \
    -u "$YOUTUBE_EMAIL" \
    -p "$YOUTUBE_PASSWD" \
    -o "%(uploader)s %(upload_date)s %(title)s.%(ext)s" \
    --dateafter $YOUTUBE_DATE \
    "http://www.youtube.com/feed/subscriptions/"