USB Camera for Google Duo in Philips Android TV

I have a Philips 49pus7503 Android TV. As you know, Google allows Duo calls on Android TV at late 2020. As I read in Google Duo in Android TV article from Google, it says that "Simply connect USB camera to TV, after that you can use this camera with microphone also.". I connect my old Logitech C270 camera, however Duo cannot find the camera. How can I do ? Thanks.