How to deactivate Mac Webcam FaceTime HD in OBS?

[informix]

I do not like to use the Mac Webcam FaceTime HD in OBS and therefore try to deactivate it within OBS.

How to deactivate the CAM itself?

As you can see by the cam lights BOTH are active, the internal Mac Webcam FaceTime HD AND the Logitech Brio 4K too.

But I have no chance in OBS to deactivate...

By configuration it's clear, that OBS has access to the cams...
Even when I do not configure or add them, both stay active

Via Preferences of the internal Cam, there are NO SETTINGS that are relevant to adjust...
I do know that Windows OBS users have more configuration options there and can deactivate each cam.

And how should Mac users deactivate a single cam ?

I do use mac OS catalina Ver. 10.15.7

Security settings do not help here, if I deactive them for OBS NO CAM is available, either the internal nor the external

Any suggestions ?

 

[SLatte Macchiato]

When choosing the option of video capture you have to pick from the dropdown menu the name of the external camera that you connected, then it will not use the integrated camera and it won't activate either.