ウェブカメラの映像と音声を出力します

stream_webcam.html

<video id="video" width="640" height="480" autoplay></video>
<script>
    var video = document.getElementById("video");
    var media = navigator.mediaDevices.getUserMedia({
        video: true,
        audio: true,
    });
    media.then((stream) => {
        video.srcObject = stream;
    });
</script>