Google Blog – 5.2.24
We’ve added the option to layouts, so that users can change their layouts to avoid cluttering the screen if they are interested to only see the participants with their videos on. This option can help reduce screen clutter and focus on video-enabled participants, meanwhile users with their videos off can be shown on screen if they speak . Note that this feature, same as other layouts options, is only specific to your meeting view and does not impact what other participants see or set for their layouts during the meeting.