<video autoplay></video>

<script>
    var errorCallback = function (e) {
        console.log('Reeeejected!', e);
    };

    navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia ||   navigator.mozGetUserMedia;

    navigator.webkitGetUserMedia({ video: true, audio: true }, function (localMediaStream) {
        var video = document.querySelector('video');
        video.src = window.URL.createObjectURL(localMediaStream);

    }, errorCallback);
</script>