const ytdl = require('ytdl-run')
 
// supports async/await
(async _=>{
  // download file into current working directory
  await ytdl('https://www.youtube.com/watch?v=JQGRg8XBnB4')
 
  console.log('downloaded!')
})()

const info = await ytdl.getInfo('https://www.youtube.com/watch?v=JQGRg8XBnB4')
 
console.log(info.title) // [MV] MOMOLAND (모모랜드) _ BBoom BBoom (뿜뿜)
console.log(info.duration) // 210

const fs = require('fs')
 
ytdl.stream('https://www.youtube.com/watch?v=JQGRg8XBnB4')
  .stdout
  .pipe(fs.createWriteStream('video.mp4'))

const opts = [
  '-o', '%(title)s.%(ext)s',
  '--audio-quality', '0',
  'https://www.youtube.com/watch?v=JQGRg8XBnB4'
]
ytdl(opts)

await ytdl.update() // => 2019.05.11 (Returns current version)