Question about Logitech C270

Up to 3.5 cm screen thickness it should work best, as then the rearmost element is used as a counterweight to the actual camera.

Up to a screen thickness of approx. 5 cm, the C270 can be placed on all screens on the upper edge, two joints are used for this. The camera can then be adjusted itself.
On screens with narrow edges, the camera covers a small part of the screen, but this should not be a problem during a video conference.