Once you’ve clicked the button, Facebook will lead you through the process of starting to use Video Calling. First, you’ll need to install an app, this may require that you allow it in your browser.
Once you’ve got it installed, you can request a chat with any available friend by starting a chat and clicking on the video camera icon.
Your friend will need to install the Video Calling app as well, once they have, you can start chatting!
If your friend is unavailable, you can record a video message to let them know you tried to reach them.
Once you’ve tried out Video Calling, let us know how your call quality and overall experience was in the comments below!
Source: thenextweb