Not able to read Video from Capture Card with GPU (Unsupported Format) while Reading with CPU works fine

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Thanks a lot, that fixed the problem with the cv::VideoCapture(). I can now open the Camera like this:

cv::VideoCapture cam("video=Microsoft® LifeCam HD-3000", cv::CAP_FFMPEG);
// cam.set(cv::CAP_PROP_FORMAT, -1); // If activated camera Window is about 1 px high and as wide as my screen

I tested also with cv::cudacodec::VideoReader() and there I get:

OpenCV(4.6.0) C:\...\private.cuda.hpp:112: error: (-213:The function/feature is not implemented) The called functionality is disabled for current build or platform in function 'throw_no_cuda'

I also looked up the post from @alex to this problem:

I did that, but it still gives me the error message.
Should I open up a new thread for this problem or could this be related?