All videos and he shared screen should be shown without any overlapping in a grid or in one line. The screen should be "filled best". Function like in Webex, Zoom
The shared screen is positioned in the upper left in a bigger scale, the user videos are positioned around it. When more user videos are available their size will shrink.
I attached a demo of this idea as a chrome-plugin. Shared screen is always 3 times the videos, the aspect ration of all videos is 4/43.
It also provided buttons for the existing shortcuts "video.arrange.keycode" (videos at top) and video.arrange.resize.keycode" (videos at bottom).
This plugin works together with Openmeetings 5.1 and 6.0.
Chrome-Plugin can be installed when Developer-mode is enabled.