Que script usa twittervideodownloader.com para baixar vídeos?

fetch("https://twittervideodownloader.com/download", {
  "headers": {
    "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
    "accept-language": "es-419,es;q=0.9,en;q=0.8,zh-CN;q=0.7,zh;q=0.6,fa;q=0.5,pt-BR;q=0.4,pt;q=0.3,ru;q=0.2,cs;q=0.1",
    "cache-control": "no-cache",
    "content-type": "application/x-www-form-urlencoded",
    "pragma": "no-cache",
    "priority": "u=0, i",
    "sec-ch-ua": "\"Not;A=Brand\";v=\"99\", \"Opera\";v=\"666\", \"Chromium\";v=\"139\"",
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": "\"macOS\"",
    "sec-fetch-dest": "document",
    "sec-fetch-mode": "navigate",
    "sec-fetch-site": "same-origin",
    "sec-fetch-user": "?1",
    "upgrade-insecure-requests": "1"
  },
  "referrer": "https://twittervideodownloader.com/error",
  "body": "csrfmiddlewaretoken=nxhrC2t535pFfgQgCGRBECKaQA9sqcuptGhI00zr8qO5YJA2yYVmY3S3CfRryqNO&tweet=http%3A%2F%2Ftwit.com%2Fsadas.com343&gql=gAAAAABpEKnjn9Gng_5TY_TaJPtWMKR945f__6YuVaKAazV_JxPiesBzJEwAMZwIlR1J3Fjz8x0dvMBXt1-yAomJmV9UbyRixIKJWTySemXkd389xvNb_VI%3D",
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
})
.then(stream=>stream.text())
.then(html=>console.log(html));