Css background video

Question

Does someone know how to center this video background?

I tried:

margin: 0 auto;
text-align: center;

So far but none of these worked

Answer 1

   .name-class {
    background: url(../images/tv-temp.png) no-repeat;
    background-position: center;
    height: 686px;
    position: fixed;
    top: 100px;
    right: 0;
    bottom: 0;
    left: 0;
    overflow: hidden;
    z-index: -100;
    }
    .name-class video {
    height: 473px;
    position: absolute;
    top: 148px;
    left: 3px;
    width: 100%;
    }