With this it is possible to use your existing camera for video conferencing with good image quality and to avoid the relatively bad ones in Macs.
There are quite a lot of Sony models supported, a list provided by Sony can be found here in the picture. System requirement on your side is at least a Mac with macOS 10.13 High Sierra.
Also other manufacturers offer a software tool to give their digital cameras a new field of application – here you can find our matching articles on this topic.
We have tried this with our Sony Alpha 5100 and have to say: it doesn’t work. Not on an iMac with macOS 10.13 (here in FaceTime at least the camera is listed, but the camera does not connect), on a 10.15 Catalina MacBook the camera does not appear at all. Pretty sobering. Does it work for you?