Suitable for larger webcams / videoconference cameras
The cover is a flap that lifts back up and over 270 degrees out of the way.
All dimensions can be altered to suit your webcam.
OPENSCAD code is commented, so hopefully useful to all.
I made the "window frame" wide as my camera had extra auto focus sensors which I didn't want to obscure when the flap was open and camera in use.

// **
// CUSTOM VARIABLES
// **
// *
top_depth_mm
rear_drop_mm
material_thickness_mm
front_width_mm
front_drop_mm
front_border_thickness_mm
front_bottom_lip_mm // optional, 0 = no bottom lip
lens_protrudes_mm // optional, 0 = lens is flat.

Prusa

i3 MK3

No

Yes

0.2

20%

Print with Supports at 4%

IMPORTANT : Print with the hinge pin VERTICAL - this is to ensure that there is no support material around the internal hinge pin.

As the hinged door pin and hinge are printed together, use a knife to cut round through the two hinge circular slots - but not all the way through, remember there is a printed pin inside.
Remove all excess support. Put a bit of force into opening the hinged door. It should crack any unwanted support material and then move freely.

Used OPENSCAD. Copied similar design ideas, but made with customizable parameters so the dimensions can easily be changed to suit different webcams.

Also allows for an optional protruding lens,
but please enter your lens protruding distance less the material thickness to get an accurate figure. For example, if your lens protrudes 5mm and the material thickness is 2mm, 5mm - 2mm = set the lens_protrude value to 3mm.
0 = flat lens.