how to add a camera in html

1  <video autoplay></video>
2
3    <script>
4    const constraints = {
5      video: true,
6    };
7    
8    const video = document.querySelector("video");
9    
10    navigator.mediaDevices.getUserMedia(constraints).then((stream) => {
11      video.srcObject = stream;
12    });
13    </script>
14