JSFiddle - React, Tailwind, and code Playground

HTML

<video></video>

JavaScript

const $video = document.querySelector('video');
navigator.mediaDevices.getUserMedia({audio: true, video: true})
.then(stream => {
  $video.srcObject = stream;
  $video.muted = true;
  $video.onloadedmetadata = function(e) {
    $video.play();
  };
})
.catch(console.error);