Blank space beneath video on resize

Hello!

I am in the process of building this website: http://lqqing.com/ , but when I resize the page to about Square dimensions or more vertical dimensions like a mobile screen, a large blank space appears beneath the video background. This can also lead to the title overflowing onto this white space rendering it invisible. Also, if the vertical size of the screen is resized so that there is very little height and a lot of width, the phone graphic hides the two app store buttons we are using. We really like the phone graphic, but this is definitely not the desired function we’d like to see. I apologize because my coding/design skills are limited, can you help us with this issue? Thank you so much! We love the theme by the way!

Best Jonathan