I am looking to make my video background like this:
<http://www.teektak.com/>

The issue I'm having is that my video is responsive, but it is fixed to the left. I can't figure out for the life of me how to make it so that it centers horizontally to the window when adjusted.

Here is a link to the test site to see what I am talking about: <https://robotplaytime.paperplane.io/>

HTML

```
<body>
    <video poster="images/robotPlaytimeVideo.png" id="bgvid" autoplay loop muted>
        <source src="images/robotPlaytimeVideo.mp4" type="video/mp4">
    </video>
</body>

```

CSS

```
html,
body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}
video { 
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    min-width: 100%;
    min-height: 100%;
    z-index: -100;
    background: url(../images/robotPlaytimeVideo.png) no-repeat;
    background-size: cover;
}

```