If you have video conferencing enabled in your system, you will see a video and chat icon on the bottom right-side of your screen.
Click on that to access a list of all users online. Then, click on any online user's name online to initiate a chat or start a video call. Once you click on their name another box will pop up where you can either chat or initiate a video call with the video button.
If it is your first time using this feature, you may have to give permissions for your browser to access your camera and microphone. Once you start a call, you can click on the red record icon to record the call. If you choose to record, the other users on the call will be informed and the video call will be saved to your Videos & Files page.
You can also share your screen with everyone on the call by clicking on the computer icon next to the microphone. When you are done sharing your screen, click 'Stop Sharing' at the bottom of your screen to switch back to the camera.
You can also click on the arrow in the upper right corner of the video picture to detach and move around the picture on your screen. Click the arrow again to move it back to the original placement. When you are ready to end the call, simply click on the phone icon to hang up.