How is a mirror removed?

Question

Video

Sobsno, this question has been tormenting me for a long time.
In the film, in the scenes where the hero looks into the mirror, the camera is behind him and we see only his reflection, but there is no camera.
The question is, how is the process of filming such scenes? The fact that the camera is removed in the editor does not seem real to me, because. all the same, some traces remained in place of the camera.

Answer 1

How many such scenes have I seen in the cinema - they were always filmed at an angle to the mirror. The farther the camera is placed, the smaller the angle can be to shoot the scene, creating the effect of looking from the side of the actor.