https://thenextweb.com/apps/2018/07/31/whatsapp-rolls-out-group-video-calls-at-last/

WhatsApp has updated its messaging service with support for group video calls, allowing you to chat with up to three more people simultaneously on its iOS and Android apps.

To use the new feature, you’ll need to first start a one-on-one voice or video call with a contact, and then tap the ‘add participant’ button at the top right of your screen.