gabut [4kdownload.to] ytmp3 dl

// source https://4kdownload.to/enXd/

const yt = {
    MAX_TRIES: 24, //times
    CHECK_PROGRESS_DELAY: 5000, // ms
    fetchJson: async function (url, requestInit) {
        try {
            const res = await fetch(url, requestInit)
            if (!res.ok) throw Error(`${res.status}`)
            const data = await res.json()
            return { ok: true, data }
        } catch (e) {
            return { ok: false, data: e.message }
        }
    },

    headers: {
        "accept-encoding": "gzip, deflate, br, zstd",
        // "Referer": "https://4kdownload.to/"
    },

    downloadMp3: async function (youtubeUrl) {
        // init
        const i = await this.init(youtubeUrl)
        if (!i.ok) throw Error(`init function fail ${i.data}`)

        // progress check
        const pc = await this.processCheck(i)
        if (!pc.ok) throw Error(`init function fail ${i.data}`)
        return pc.data
    },

    init: async function (youtubeUrl) {
        console.log('init')
        const url = new URL('https://p.savenow.to/ajax/download.php')
        url.search = new URLSearchParams({
            'copyright': '0',
            'format': 'mp3', // modifi this value if u want other format, read web api docs
            'url': youtubeUrl
        })
        return await this.fetchJson(url, { headers: this.headers })
    },

    processCheck: async function (initObj) {
        console.log('progress check')
        if (!initObj.data.success) throw Error(`return value from init is not success`)
        const url = initObj.data.progress_url

        let res = await this.fetchJson(url, { headers: this.headers })
        if (!res.ok) throw Error(`${res.status}`)
        if (res.data.success) return res

        for (let i = 0; i <= this.MAX_TRIES; i++) {
            console.log(`try ${i + 1}/${this.MAX_TRIES}`)
            res = await this.fetchJson(url, { headers: this.headers })
            if (!res.ok) throw Error(`${res.status}`)
            if (res.data.success) return res
            console.log(`${parseInt(res.data.progress) / 10}% (${res.data.text || '(unknown)'})`)
            await new Promise(r => setTimeout(r, this.CHECK_PROGRESS_DELAY))
        }
    }
}

await yt.downloadMp3("https://www.youtube.com/watch?v=7iNbnineUCI&list=RDBy7ctqcWxyM&index=22")
    .then(console.log)
    .catch(console.log)

/* output
{
  success: 1,
  progress: 1000,
  download_url: 'https://leo3.savenow.to/pacific/?F5OkmTGnaDtxS6yq0KzmF9z',
  text: 'Finished',
  message: 'If you want your application to use our API contact us: [email protected] or visit https://video-download-api.com/',
  alternative_download_urls: [
    {
      type: 'nip.io',
      url: 'https://81-17-16-210.nip.io/pacific/?F5OkmTGnaDtxS6yq0KzmF9z',
      has_ssl: true
    },
    {
      type: 'sslip.io',
      url: 'https://81-17-16-210.sslip.io/pacific/?F5OkmTGnaDtxS6yq0KzmF9z',
      has_ssl: true
    },
    {
      type: 'traefik.me',
      url: 'http://81-17-16-210.traefik.me/pacific/?F5OkmTGnaDtxS6yq0KzmF9z',
      has_ssl: false
    }
  ]
}
  */