Improve quick-install (#16)

* improve quick-install example with full setup case

* add herpaderp movie

docs/installation_guides/quick_install.md

@@ -6,9 +6,18 @@ This will ask you to choose your operating system in order to prepare the [seat
 
 Example usage:
 ```
+$ apt-get update
 $ bash <(curl -fsSL https://git.io/v15KU)
  * SeAT Installer Operating System Selection
 1) CentOS 6	 3) Ubuntu 14.04  5) Quit
 2) CentOS 7	 4) Ubuntu 16.04
  * Please select the target operating system:
+
+  ...
+
+ $ php /var/www/seat/artisan seat:admin:reset
+ $ php /var/www/seat/artisan seat:admin:email
 ```
+
+Some of you may be more visual learner than reading learner, therefore, you better should see this quick how-to movie into which you'll setup a fresh new SeAT instance in less than 10 minutes
+http://somup.com/cbjUQ0V2cF