title: Kurento hello world doesn't showed video
body: <p>I am new in kurento. I have installed kurento 6.0 in my PC having ubuntu 14.04 (using the <a href="https://www.kurento.org/docs/6.0.0/installation_guide.html" rel="nofollow">following</a> procedure) and tried to run the hello world example. After installation,
  1- I run kurento with:</p>
  
  <p><code>sudo service kurento-media-server-6.0 start</code></p>
  
  <p>To clone and launch the hello-world java version using:</p>
  
  <pre><code>git clone https://github.com/Kurento/kurento-tutorial-java.git
  cd kurento-tutorial-java/kurento-hello-world
  mvn compile exec:java
  </code></pre>
  
  <p>3- Access to the webpage
  https:localhost:8443</p>
  
  <p>But when I click on start no video has been displayed {captured from my laptop camera}; the loading image is always displayed. Note that the same issue is observed on both chrome and firefox.</p>
  
  <p>The following is the console log displayed by the web page</p>
  
  <pre><code>Page loaded ...
  Starting video call ...
  Creating WebRtcPeer and generating local sdp offer ...
  </code></pre>
  
  <p>What I am I doing wrong here?</p>