JSFiddle - React, Tailwind, and code Playground

by Alin Guta

HTML

<div id="mainvideo">
</div>

CSS

#mainvideo{
    position: relative; /*Add a position to your video*/
    width: 960px; /*You had it 1250px */
    height: 500px;
    margin:0; /*You don't need any margin if you have the parent div also 960x500px*/
    float:none; /*You don't need float*/
    padding:0;
    background:red;
}