m3uLoader.js

const r = require("request-promise-native");
const fs = require("fs").promises;

const main = async () => {
  const index = await fs.readFile("src/pages/index.md", "utf8");
  const matches = [...index.matchAll(/videoId="(\d*)"/g)];
  const videoIds = matches.map((match) => match[1]);
  console.log(`Found videoIds in index.md: ${videoIds}`);

  for (const videoId of videoIds) {
    const jsResponse = await r.get(
      `https://deviceids-medp.wdr.de/ondemand/${videoId.substring(
        0,
        3,
      )}/${videoId}.js`,
    );
    const jsonResponse = jsResponse.match(
      /\$mediaObject.jsonpHelper.storeAndPlay\((.*?)\);/,
    )[1];
    const parsed = JSON.parse(jsonResponse);
    const m3uUrl = parsed.mediaResource.dflt.videoURL;

    const m3uResponse = await r.get(`https:${m3uUrl}`);
    await fs.writeFile(`./static/m3u/${videoId}.m3u8`, m3uResponse);
  }
};

main().then(() => console.log("Downloaded M3U files."));