Are landlords allowed to take pictures of the interior of a tenants apartment (including tenants personal property ) to prove to owner "walls are still standing?

Yes, however, they are not allowed to take pictures inside of your property. EXAMPLE. The landlord takes a picture of the wall and your dresser is in front of said wall. Ok. The landlord opens your dresser drawers and takes picture of its contents. NOT OK. There is some room for grey area. ie; inside the kitchen cabinets or closets, since the property belongs to the landlord is okay.

You need to call tennant advocant. Filming your personal property is an intrusion