Flawed Logic
Putting a cover over your webcam is probably of limited benefit - if they can capture your video feed without you noticing, then they'll be logging all of your passwords, visited sites, contacts, financial records and so on. So even if they don't capture you polishing your pickle, they'll know you have been (and perhaps even grabbed any audio).
Also, I always assume that anyone who has put a cover over their work laptop is using said work laptop for non-work purposes. So firstly, eww, and secondly, there is a fair chance that IT will be logging your evening entertainment preferences, so maybe buy a cheap tablet instead for that sort of activity.