How do I start a Facebook video call with a friend?

What is Facebook Video Calling?After you complete the quick, one-time setup, you’re ready to make your first call:
  1. Visit your friend’s profile and click the “Call” button in the top right corner. If you and your friend are already chatting, you can also click the video icon at the top of your chat window.
  2. When your friend answers, you may have to wait a moment for your call to connect before the video call begins. If your friend hasn't set up video calling yet, you’ll be asked to wait until the setup is complete.
  3. If your friend is unavailable, you can leave a video message. The time and date of your missed call will be listed in your ongoing message history with your friend.
Having trouble? Make sure your webcam and microphone are both up and running, then try again.