One example of streaming videos using VidStreamer.js.

Server:

/*global require*/

var http = require("http");
var vidStreamer = require("vid-streamer");

var newSettings = {
    rootFolder: "C:/videoStreaming/videos/",
    rootPath: "videos/",
    forceDownload: false
};

var app = http.createServer(vidStreamer.settings(newSettings));
app.listen(3000);

Client:

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <video autoplay>
        <source src="http://localhost:3000/videos/a.mp4" type="video/mp4">
    </video>
</body>
</html>