I would like to clarify here that the link you are using refers to our previous module for moodle. That module was offered free of cost but required teachers and students to sign-up on WiZiQ to attend a class.
We recently launched a new version of our module that doesn't need teachers or students to sign-up before attending a class. But we offer this module for moodle to the users registering for our organizational version http://org.wiziq.com. So, all the users registered with www.wiziq.com, even the premium members of WiZiQ need to create a separate account on http://org.wiziq.com in order to use the module in moodle. You can get started with our 30-day free trial and later purchase a plan on to continue using the module.
Admins/Teachers can schedule a class and send the class link to the teachers and students. You may check more details about our new module on this link http://org.wiziq.com/moodle and check a live demo of our module on this link http://moodledemo.wiziq.com/
How to use WiZiQ Virtual Classroom module for Moodle:
1. Create and confirm your account on http://org.wiziq.com.
2. Download the module zip file from http://org.wiziq.com/moodle
3. Install the module and block in your moodle and start using the module. You may refer readme.txt file to go through the installation steps. Make sure that you have soap enabled on your php to use our module.
4. After you successfully install the module, access WiZiQ Live Class as an activity and get started.
System Requirements to use this module would be PHP version 5 or above and soap module enabled in php.