Private Vimeo / Akamai CDN long video downloader

index.js

// NOTE: you might have to run it a few times if it doesn't download the full video from the first try, I guess it needs to be cached or something..

const { appendFileSync, writeFileSync } = require("fs");
const https = require("https");

// find that URL in devtools, search for akamai, there's also manifest with different names based on quality (remove &range from it)
const URL = `https://xxxxx-adaptive.akamaized.net/exp=0000000000~xxx=xxxxxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxxxxxxxx~xxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/parcel/video/xxxxxxxx.mp4?r=xxxxxxxxxxxxxxxxxx`;
const rangeWidth = 1000000000; // using smaller range will be slower, but might result in more stable/reliable download success

let foundEnd = false;
let currentStart = 0;
let gotData = 0;

const fileName = "video.mp4";

currentStart === 0 && writeFileSync(fileName, "");
let data = [];
const getNextChunk = () => {
  const currentUrl = `${URL}&range=${currentStart}-${currentStart + rangeWidth}`;
  console.log(currentUrl);
  const request = https.get(currentUrl, (response) => {
    data = [];

    if (response.statusCode !== 200) {
      console.log({ statusCode: response.statusCode });
      foundEnd = true;
      process.exit();
    }

    response.on("data", (chunk) => {
      gotData++;
      gotData % 1000 === 1 && console.log("got data", chunk);
      data.push(chunk);
    });

    response.on("end", () => {
      console.log("end of chunk");
      for (const datum of data) {
        appendFileSync(fileName, datum);
      }
      if (!foundEnd) {
        currentStart += rangeWidth + 1;
        getNextChunk();
      }
    });

    response.on("close", (x) => console.log("close", x));
    response.on("error", (x) => console.log("error", x));
    response.on("pause", (x) => console.log("pause", x));
  });

  request.on("error", (error) => {
    console.error("found error/end", error);
    foundEnd = true;
  });
};

getNextChunk();

Also if it fails with connection reset - see last URL in log and change currentStart to the starting range from the last URL that was unsuccessful.