This is a working example of manipulating a video stream using HTML5 <video> elements, the getUserMedia method which returns a Promise<MediaStream> object.
The MediaStream object wraps the video stream from your webcam. Then, it attachs the stream to the input <canvas> element. This will allow us to pull the array of pixel data from the canvas.
Finally, the output <canvas> element is where we draw the manipulated pixel data.
open index.html, click "Allow" to let your browser use your camera. Then click "Manipulate", that will stream the video into the canvases.
This example was based on this awesome tutorial from deepstream.io. Head over to DeepStream.io and check out their sweet website.