Simple Express HTTP example for streaming mp4 video from s3.

express-movie-server.js

const AWS = require('aws-sdk');
const express = require('express');
const app = express();

const MOVIE_LOCATION_S3 = 'location/of/movie.mp4';
const AWS_S3_BUCKET = 's3/bucket'
const AWS_S3_ENDPOINT = 's3-ap-southeast-2.amazonaws.com'

const s3bucket = new AWS.S3(
    {
      params:{
        Bucket : AWS_S3_BUCKET
    },
    endpoint : AWS_S3_ENDPOINT
  });
app.use('/movie.mp4', (req, res)=>{
    var s3Opt = {Key:MOVIE_LOCATION_S3};
    if(req.headers.range){
        s3Opt.Range = req.headers.range;
    } else {

       //return 
       return res.sendStatus(416); 
    }
    var resp = s3bucket.getObject(s3Opt, (err, data) => {
        if(err){
            return console.err(err);
        }
        console.log(data);

        res.status(206);
        res.setHeader("Content-Range", data.ContentRange);
        res.setHeader("Accept-Ranges", "bytes");
        res.setHeader("Content-Length", data.ContentLength);
        res.setHeader("Content-Type", "video/mp4");
        res.send(data.Body);
            
    });
})
app.use((req, res)=>{
    res.writeHead(200, { "Content-Type": "text/html" });
    res.end('<video src="http://localhost:8888/movie.mp4" controls></video>');
})
  
 app.listen(8888, function () {
  console.log('Movie Server on 8888!');
});   

Set the constants MOVIE_LOCATION_S3, AWS_S3_BUCKET and AWS_S3_ENDPOINT to your content location. L5-L7