title: I am trying to download video using pytube however for some reason no sound is downloaded
body: <p>When running the following program a video is downloaded however it appears there is no sound. Can someone help me to fix it?</p>
  
  <pre><code>from pytube import YouTube
  
  path = '/home/15g2leve'
  url = "https://www.youtube.com/watch?v=GyQjVtIGQg8"
  resol = "1080p"
  file_type = "mp4"
  
  
  video = YouTube(url)
  
  Streams = video.streams
  
  vid = Streams.filter(res = resol, file_extension = file_type).first()
  
  vid.download(path)
  </code></pre>