Found a solution!
There has to be a bug in Desktop Video 11.6 from Blackmaic. I uinstalled it and installed Desktop Video 11.5.1. Both my cameras and monitor now works in Unreal Engine 4.25.3
Found a solution!
There has to be a bug in Desktop Video 11.6 from Blackmaic. I uinstalled it and installed Desktop Video 11.5.1. Both my cameras and monitor now works in Unreal Engine 4.25.3