Attempting to use folder other than /var/www/html

I am running Ubuntu (+LAMP) stack for my webserver. Everything for webserver seems to be working fine. For example I have index.php page with

<?php
phpinfo();
?>

inside /var/www/html & also under /var/www/mytestsite.com/ From inside the webserver, both sites @ http://MyServerIPAddress/hello.php & http://MyServerIPAddress/mytestsite.com/hello.php are working showing proper phpinfo.

When I test the same from outside the server, I can only reach page inside /var/www/html http://MyServerIPAddress/hello.php But page access to http://MyServerIPAddress/mytestsite.com/hello.php Message shows

Not Found
The requested URL /example.com was not found on this server.
Apache/2.4.7 (Ubuntu) Server at *MyServerIPAddress* Port 80.

Here is mytestsite.com.conf I used for apache

<VirtualHost *:80>
    ServerAdmin admin@mytestsite.com
    ServerName mytestsite.com
    ServerAlias www.mytestsite.com
    DocumentRoot /var/www/mytestsite.com
</VirtualHost>

And also matched folder access & owner setting to the match for both /var/www/html and /var/www/mytestsite.com

What extra configuration DO I need to be able to access sites outside /var/www/html folder?

Solution

I found the answer to my own question after looking at apache logs and help from others First thing I changed my website's apache conf file to

<VirtualHost *:80>
        ServerAdmin admin@mytestsite.com
        ServerName mytestsite.com
        ServerName <ServerIpAddress>
        DocumentRoot /var/www
        <Directory /var/www/mytestsite.com/public_html**/>
                Options -Indexes +FollowSymLinks +MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
        </Directory>
        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Also I made changes to /etc/hosts file to include include the site as

<localhostIp>       localhost
<localhostIp>       ubuntu
<ServerIpAddress>   mytestsite.com mytestsite.com

After I made the changes, I can access site from outside the server