Fullscreen Homepage Video Background

Hello There 🙂
i use Plugin Shortcodes Ultimate but can’t figure fullscreen Video background for Homepage,

i use this shortcode:

[su_youtube_advanced url=”https://www.youtube.com/watch?v=WKJGJ3q241c ” width=”1280″
height=”720″ controls=”no” autohide=”yes” showinfo=”no” autoplay=”yes” loop=”yes”
rel=”no” modestbranding=”yes” theme=”light” https=”yes” wmode=”transparent”][/su_youtube_advanced]

look here -> http://levangiorgadze.com/

1. how i can to set auto detect ratio for all monitor size? it’s a possible
in this shortcode plugin or somewhere in Theme CSS?

Please Help
Thanks!
🙂