If you're calling someone from your desktop or mobile app, you can turn off the video before you start the call by making an audio call .
Or, if you want the person to be able to see you, make your call a video call . You can do that from desktop, mobile, or web. If you change your mind, you can always turn off your video during your call.
And if you'd prefer not to share your video in any of the calls that you receive, you can turn off your video for all incoming calls too.