title: Opening web camera in Google Colab
body: <p>I am trying to open a web camera in Google Colab. I've executed the following command:</p>
  <pre><code>cap = cv2.VideoCapture(0)
  </code></pre>
  <p>but this is not working: the web camera is not opening.</p>
  <p>Is it possible to open a connection to my web camera on Google Colab?</p>