Given that the webcam works with the camera app, it's less likely a hardware issue or a general driver problem. The correct answer is to verify privacy settings for the video conferencing application, as these settings could be configured to block camera access. Checking for BIOS/UEFI updates is less likely to resolve the issue, given that the webcam does function correctly in another context. Replacing the webcam is an unnecessary step at this point because the hardware works with the camera app, indicating it is functioning. Reinstalling all system drivers is too broad an action for this specific application issue; targeted troubleshooting should be performed first to identify and resolve the problem efficiently.