title: WebRTC video calling and audio calling not working only chat works?
body: <p>I am using source code from github: <a href="https://github.com/amirsanni/Video-Call-App" rel="nofollow noreferrer">https://github.com/amirsanni/Video-Call-App</a>
  I want two devices to communicate with each other while they are connected in same wifi network and i have  a local server in the same network without internet. 
  Chat is working but audio and video are not working?</p>