It is important to know that the installer is for KA Lite software and not the entire library of KA Lite content (which is around 150 GB). If you installed KA Lite online, you can use the admin interface to download the content. If you’re using the offline installer, then you would need to get video content and put it in the correct content folder on your device. More details can be found here:
http://ka-lite.readthedocs.io/en/latest/usermanual/userman_admin.html#downloading-videos