It is more specific in France, but I actually dug around regulations a year ago when the other homeowners in my building wanted to install a security camera. The common parts of a residential building are considered somewhere in between public and private.

The short version is you need majority approval, the tape can only be accessed if something happens, you can’t film apartments doors or windows and as few people as possible may have access. Which put quite a damper on my neighbours who were already celebrating how they would watch who enters and leaves the building at all times.
Bunch of fucking weirdos.