Video background not scaling with screen size

Hi,
I'm fairly new to joomla and website designing as a whole, so forgive me if i'm a bit slow.

My website is www.stolen-hearts.co.uk

Basically, my problem is that i've installed the background video extension and i'm having trouble with the scaling on the video on different sized screens and the text and logo below overlapping the video. I have a feeling this may be because i've had to place the video in a 'module position', rather then in 'full screen' mode. I've tried to set it as full screen mode, but the appears above my website and you can only see a tiny line of the video above the website.
Idealy, i just want the video to appear full screen at the top of the page, then the rest of the website is revealed as you scroll down.

Extra info:
template i'm using - www.rockettheme.com/joomla/templates/myriad
JUX Background Video position - slideshow

Thanks for your help!

Hi lithrin,
thanks for contacting us and choosing our product!
About your problem with jux background video first please try change position of logo and description to slideshow.
If it can't help please pm me your site url and admin account. I'll check and help you to find solution!