After enabling the call audio group in the Messenger app with support for up to 50 participants, Facebook today launched the ability to group video in its popular messaging service. The ability to video chat in groups is the most requested feature in Messenger. The feature is available today from iOS / Android and the desktop version of the messaging service.
To activate group chat in a face-to-face conversation, you must touch the new video icon at the top right of the screen. All members of the group will be notified that you have started a video chat and each person can join if they wish.
You can also call directly only a few people or the entire group.