JS Canvas Webcam Slow Scrollin 3D Style SRC

<body bgcolor="black">
<video id="video" hidden>
</video>
<canvas id="canvas" width="5000" height="5000" style="border:32px solid">
<script>
var video = document.getElementById("video");
var c = document.getElementById("canvas");
var ctx = c.getContext("2d");
var i=6;
    var rr=0;
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var video = document.getElementById('video');
var mediaConfig = { video: true,audio:false};
navigator.mediaDevices.getUserMedia(mediaConfig).then(function(stream) {
video.src = this.window.URL.createObjectURL(stream);
video.play();
video.addEventListener("play", function() {i = window.setInterval(function() {
ctx.drawImage(video,rr,rr++)},0.0001);
if(rr>30){
  rr=+30;
}else{
  rr=-30;
}
}, 0.0001);
});
</script>