Taping your camera doesn't necessarily look like anything. I have a small piece of electrical tape over my webcam, and it blends in so perfectly with the background that other people probably wouldn't see it unless they were specifically looking for it.

(I personally just leave the tape there all the time, because if I need to videoconference, I’d rather connect my mirrorless camera with a much better lens and sexy bokeh.)

Permanent black marker ink over camera lens. Easier fix