JSFiddle - React, Tailwind, and code Playground

HTML

<video src=""></video>

JavaScript

var vid = document.querySelector('video');

function convertToObject(obj) {
	obj = {}
  for(var p in vid) {
    obj[p] = vid[p];
  }
	return obj;
}

var result = Object.assign(convertToObject(vid), {www:1});
console.log(result);
console.log(result.www);