screen sharing is black

[Glenda2]

How do I share a video that is not just a black screen for my guests?

[RachelGomez123]

The black screen during screen sharing could be caused by a graphics card with automatic-graphics switching (such as an Nvidia card).
In the Windows Control Panel, open Nvidia Control Panel.
Click Manage 3D Settings.
Click Program Settings under I would like to use the following 3D settings.

Regards,

Rachel Gomez