Incorrect placement of background video in div/jumbotron - html

Question

I have a video playing in the background of a div, however rather than showing behind the text the video is showing as a seperate section above the headline/signup form.
Live example: http://185.123.96.102/~kidsdrum/moneynest.co.uk/
I'd like the text and email signup form to show on top of the video.
Please note I'm using Bootstrap for a responsive design (video hidden on tablets/mobiles).
I'd like a video to play in the background of my jumbotron.
With full width and a height of 100% of the browser window (more content below when scrolled), this worked for an image but is having issues now.
CSS
.jumbotron {
color: white;
position:relative;
overflow:hidden;
height:500px
}
html,body {height:100%;}
.special,.special .jumbotron
{height:100%;
width: 100%;
margin: 0px;
padding: 0px;
border-radius: 0px;
}
.fullscreen-bg {
position: fixed;
top: 0;
right: 0;
bottom: 0;
left: 0;
overflow: hidden;
z-index: -100;
}
.fullscreen-bg__video {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
#media (min-aspect-ratio: 16/9) {
.fullscreen-bg__video {
height: 300%;
top: -100%;
}
}
#media (max-aspect-ratio: 16/9) {
.fullscreen-bg__video {
width: 300%;
left: -100%;
}
}
#media (max-width: 767px) {
.fullscreen-bg {
background: url('../img/videoframe.jpg') center center / cover no-repeat;
}
.fullscreen-bg__video {
display: none;
}
}
HTML
<div class="jumbotron">
<div class="fullscreen-bg"></div>
<div class="container special">
<video loop muted autoplay poster="img/videoframe.jpg" class="fullscreen-bg__video">
<source src="http://185.123.96.102/~kidsdrum/moneynest.co.uk/vid/people-with-no-money-worries.mp4" type="video/mp4">
</video>
</div></div>
<div class="container text-center">
<div class="h1extrapadding hidden-xs hidden-sm"></div> <h1 class="boldme">Aged 20-30 & frustrated with money?</h1>
<div class="greenpromobox">
<div class="h2extrapadding hidden-xs hidden-sm"></div> <h2 class="boldme">Take our free <b class="jumpstarttext">Jumpstart Your Finances</b> class to<br /> quickly gain control over your finances</h2>
<!-- Begin MailChimp Signup Form -->
<div id="mc_embed_signup">
<form action="//moneynest.us11.list-manage.com/subscribe/post?u=9ccf2d2219536b32eaae3c3d1&id=299de51b4e" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate>
<div id="mc_embed_signup_scroll">
<img src="http://185.123.96.102/~kidsdrum/moneynest.co.uk/img/hand-drawn-arrow.png" id="handarrow" class="hidden-xs hidden-sm" alt="arrow"><input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="Enter your email address" required autofocus>
<!-- real people should not fill this in and expect good things - do not remove this or risk form bot signups-->
<div style="position: absolute; left: -5000px;" aria-hidden="true"><input type="text" name="b_9ccf2d2219536b32eaae3c3d1_299de51b4e" tabindex="-1" value=""></div>
<div class="clear"><input type="submit" value="Start Class Now" name="subscribe" id="mc-embedded-subscribe" class="text-uppercase btn btn-primary btn-lg"></div>
</div>
</form>
</div>
<!--End mc_embed_signup-->
</div>
</div>
</div>
</div>
</div>

Answer 1

Add following style to Your .jumbotron
margin-bottom: -500px;
z-index: -1;
Should help You with this static setup. You can also play with margins values of this elements to layout them correctly.

Answer 2

Try this
.greenpromobox
{
top: 40px;
z-index: 9999999;
position: absolute;
margin-left: 20%;
}

Answer 3

add a class in your div (text and email signup form), I have added .emailBox for example and add the following style in that
.emailBox {
left: 50%;
margin-left: -585px;
position: absolute;
top: 0;
}
hope this will solve your issue.