Zoom not using webcam, but other apps do (RDP)
The video preview in the Zoom desktop app just shows a grey box. My webcam is the selected webcam. It is the only webcam on the list. Other apps (like webcamtests.com and splitcam) show video from my webcam. Zoom DOES pass through audio. Since other apps show video and Zoom does audio, I've obviously configured the RDP connection to pass through video and audio. Why would Zoom fail to do video when other apps can?
