title: Draw annotation on Twilio Video Chat
body: <p>I want to use twilio for Remote assistance. 
  Where user can share camera feed and Technician can assist by drawing annotations on the screen.
  similar to the demo video on <a href="https://www.twilio.com/video" rel="nofollow noreferrer">https://www.twilio.com/video</a>
  I was able to get the Video Chat running on my iOS devices.
  Can you please guide me how to make annotations on one device which will be shown on the other device.</p>