This is what happens when someone observes the bizarre fad of "planking" and says to themselves, "I could make a movie out of that."
If we don't let our cynicism overwhelm our suspension of disbelief, then 'This house has people in it' is duly unsettling. Preparing for their son's birthday party, a young couple has an argument in the kitchen. It's a very curious thing, that their teenage daughter is lying on the floor in an act of apparent rebellious disobedience, and they readily ignore her casually disruptive behavior as the passing phase that it is. Until it becomes clear something else is going on.
The surreal occurrence in the kitchen gives way to other parts of the house unraveling, and we get to watch it all through the security cameras that have a (seemingly impossibly mobile) eye on each room. As the scenario unfolds, more things continue to go wrong, further building the unease of the short, culminating in a climactic unexplained event.
I appreciate the simplicity here. Each scene is depicted as an apparent recording of the events on a VHS tape, which is a little anachronistic since the short itself dates the events to 2015, when VHS was already mostly forgotten as a format. But still, the inherent nostalgia lends a small bit of credibility to the scenario, aiding our suspension of disbelief and fostering the notion that this is a thing that really happened, and could happen.
There's not a great deal of plot, and there's not a great deal to say. This is less an active narrative than the passive observation of events as they occur. It's odd, certainly, but with just the right helping of creepiness to keep us engaged.
'This house has people in it' isn't going to be for everyone or have broad appeal, but it's an intriguing watch if you're looking for something a bit different.