I followed your documentation. Your documentation does not tell me to import a predefined template.

This is what your documentation says:

2. Usage
Video Carousel Addon has very simple usage. When create a page with Visual Composer, click to add element icon “+”
You’ll see the “Video Carousel” button.
When click to the “Video Carousel” icon, Video Carousel Settings” popup will opened and you will be able to define options.

Please correct your documentation if you want to say something about a predefined template.