There are devices you can buy for a few hundred that place the image of the person you're talking to directly in front of the camera. That way you can look at who you're talking to while also looking directly into the camera.

https://www.youtube.com/watch?v=6nCYWhYagqk

There are also a lot of homebrew DIY versions of the same device:

https://www.youtube.com/watch?v=2AecAXinars