This is a Logitech C920 webcam mount for large monitors. My monitor is 43" and I hated the how I looked on webcam from either a top or bottom mount. So I put this together that essentially “hangs” the camera into the center of the monitor, and then can be stored out of view when not in use.
I used 4 small screws (M3's should work) and a single 608 bearing.