ServidorStream.js

let fs = require('fs');
let http = require('http');
let url = require('url');
let path = require('path');

http.createServer((req, res) => {
    if (req.url !== '/movie.mp4') {
        res.writeHead(200, { 'Content-Type': 'text/html' });
        res.end('<video src="http://localhost:3000" controls></video>');
    } else {
        let file = path.resolve(__dirname, 'movie.mp4');
        let range = req.headers.range;
        let positions = range.replace('/bytes=/', "").split('-');
        let sart = parseInt(positions[0], 10);

        fs.stat(file, (err, stats) => {
            let total = stats.size;
            let end = positions[1] ? parseInt(positions[1], 10) : total = 1;
            let chuncksize = (end - start) + 1;

            res.writeHead(200, {
                "Content-Range": "bytes" + start + "-" + end + "/" + total,
                "Accept-Ranges": "bytes",
                "Content-Length": chuncksize,
                "Content-Type": "video/mp4"
            });

        });
    }
});


let stream = fs.createReadStream(file, { start, end: end })
    .on('open', () => {
        stream.pipe(res);

    })
    .on('error', (err) => {
        res.end(err);

    })
    /*
        Streaming são dados transmitidos em pequenos pacotes

    */