>sudo apt-get install curl php-curl
>sudo apt-get install aria2
>mkdir /var/log/aria2c /var/local/aria2c
>touch /var/log/aria2c/aria2c.log
>touch /var/local/aria2c/aria2c.sess
>chown www-data.www-data -R /var/log/aria2c /var/local/aria2c
>chmod 770 -R /var/log/aria2c /var/local/aria2c
>ln -s /usr/local/bin/youtube-dl /usr/bin/