75. yt1s.com.co [youtube] [downloader] [audio] [video] [yt1s-worker-3.dlsrv.online]

/*
  by wolep
  update 10 desember 2025
  base https://yt1s.com.co/
*/

const yt = {
    _static: {
        apiAudio: 'https://dlsrv.online/api/download/mp3',
        apiVideo: 'https://dlsrv.online/api/download/mp4',
        baseHeaders: {
            "accept-encoding": "gzip, deflate, br, zstd",
            "content-type": "application/json",
            "origin": "https://yt1s.com.co",
            "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1"
        },
    },

    _resolvePayload: function (userFormat = '128k') {
        const validFormats = ['64k', '96k', '128k', '256k', '320k', '144p', '240p', '360p', '480p', '720p', '1080p']
        if (!validFormats.includes(userFormat)) throw Error(`invalid input '${userFormat}'. please use one of these ${validFormats.join(', ')}`)
        const api = /k$/.test(userFormat.trim()) ? this._static.apiAudio : this._static.apiVideo
        const quality = parseInt(userFormat) + ""
        return { api, quality }
    },

    download: async function (videoId, userFormat = '360p') {
        const { api, quality } = this._resolvePayload(userFormat)
        const headers = this._static.baseHeaders
        const body = JSON.stringify({ videoId, quality })
        const r = await fetch(api, { headers, body, method: 'post' })
        if (!r.ok) throw Error(`${r.status} ${r.statusText} di fungsi download`)
        const html = await r.text()
        const downloadUrl = html.match(/href='(.+?)';/)?.[1]
        if (!downloadUrl) throw Error(`gagal mendapatkan download url. regex fail!`)
        return { downloadUrl }
    },
}

// cara pakai
yt.download('By7ctqcWxyM')
    .then(console.log)
    .catch(console.log)

/* output
{
  downloadUrl: 'https://yt1s-worker-3.dlsrv.online/tunnel?id=JH7DTysSS2xGNqv06ZpPf&exp=1765345200491&sig=lMXhGQ0grMog3jUutcFk3CWbJXDrdEjuPjvoPwE5GBs&sec=pFKd7cpsyIarX1jYufzxnQRB0Htpv-3nNP3ihXRnU0I&iv=_kxeDpzEIMs6-WbX3o7_SA'
}
  */