AEM_CNTRL: Create screen recording demonstrating how to install AEM

A video is worth a thousand words of documentation. Having a video demonstration of the installer would make it a lot easier for people to grasp what is involved (and how easy it is).

The video should cover the following points:
* Create `aem_user`
* Create `/opt/adobe` and `chown aem_user:aem_user /opt/adobe`
* `JBang` is in the PATH (perform a `JBang --version` command)
* All the installation files are in the current directory (perform a `dir` or `ls`)
* Demonstrate the location where AEM is to be installed does not exist (again using `dir` or `ls`)
* Invoke the installation
* Show that AEM is installed properly (run AEM, then go to the admin us/welcome to show the SP#)