JSFiddle - React, Tailwind, and code Playground

HTML

<video muted="true" autoplay="true" class="vid" id="robotVid">
    <source src="http://techslides.com/demos/sample-videos/small.mp4" type="video/mp4">
</video>

CSS

.vid
{
  position:fixed;
  top:0;
  left:0;
  min-width:100%;
  min-height:100%;
  margin:0 auto;
}

JavaScript

(function () {
    var vidElem = document.getElementById('robotVid');
    console.log(vidElem);
    vidElem.addEventListener("timeupdate", function () {
        if (vidElem.currentTime > 5) {
            vidElem.currentTime = 2.5;
            vidElem.play();
        }
    }, false);
})();