It is very atmospheric, the pixels on pictures add some mysteries as we are not sure of what we are watching. I think i need a second playthrough to interpret correctly the story.
Don't read the following if you don't want to be spoiled. I will share you some observations i've made in my first playthrough:
-The man with a cigar then the one next to the Effel tower is similar to you Thomas or am i seeing what i want to see :p? Also he has something from the big brother in the game "Control"
-Some clocks display a different hour so the time is broken?
-The experimental film seems show a small house in the middle of an ocean during the midnight, are we in this house?
-During the experimental film a hand try to unplug the socket, is it rly in the film or a camera that show what is happening somewhere in the house, anyway it was a little scary and uncanny
-The dog is still barking but he is not in his appartment so i suppose he is haunting the house
-The firework, the nature and monuments that we see on pictures are everything they can't experiment in their alienate life?
-The eyes on the mirror and at the end are people that control us, prevent us from leaving the house or a reflect of who we are an empty soul?
-The urbex picture is a metatheatre of what we are doing in this desolate house?
-Why our character seems to not understand the world like if was born just yet, i mean he seems like an alien sometimes in his thinking. Are we a ghost, an alien, a newborn in this desolate house?
-Somoene has making a hole in his wall trying to escape? But knew that whatever you do the house don't let you go out?
-The sheeps at the end are an allegory of their conditioned and restricted fake world?
-Is this house like a mini Truman Show?
-In my playthrough the game ended before i've opened all the doors, do a second one may allow me to explore those locked rooms?
-I could share many more thoughts but i feel like i've been too rushy especially in name memorisation so i might have missed some essential clues.
Conclusion; Maybe i am too dumb to see the obvious meaning of all this, but anyway i have a good moment searching the sense and story hidden behind the walls. I will edit my comment after my second playthrough.
EDIT: In my second playthrough i didn't find more clues, but now i think it's on purpose, like people should fill the gap with their own fears, beliefs and theories. The message at the end says that once outside all what remain of us behind is few pictures and furnitures but do we speak rly of outside or death? Like when you die you let nothing behind except those kind of things. Do outside means in reality afterdeath or void?