JSFiddle - React, Tailwind, and code Playground

HTML

<video id="video" autoplay="autoplay"></video>
<input type="file" id="file">

JavaScript

$(function()
{
	var myfile='';
  $('#file').on('change',function(e)
  {
  	var tgt = e.target || window.event.srcElement, files = tgt.files;
    if(FileReader && files && files.length)
    {
      var fr = new FileReader();
      fr.onload = function()
      {
        myfile = fr.result;
        $('#video').attr({'src':myfile});
      }
      fr.readAsDataURL(files[0]);
    }
  });
});