A simple script to stream a video in the browser.

cam.js

window.onload = function() {
    navigator.getUserMedia({
        video: true,
        audio: false
    }, function(localMediaStream) {
        console.log(localMediaStream)
        var video = document.querySelector('.camera');
        video.srcObject = localMediaStream;
        video.onloadedmetadata = function(e) {
           
        };
        video.play();
    }, function(error) {
        if(error === PERMISSION_DENIED) {
            //
        } else {
            alert(error);
        }
    })

    
    document.querySelector('.full-screen').onclick = function () {
        if (!document.fullscreenElement) {
            document.querySelector('.camera').requestFullscreen().catch(err => {
              alert(`Error attempting to enable full-screen mode: ${err.message} (${err.name})`);
            });
          } else {
            document.exitFullscreen();
          }
    }
}