I liked it. It was quite subtle in places as the mysterious events unfolded and the tension mounted.
THE FOLLOWING SENTENCE MIGHT BE CONSTRUED AS A VERY MINOR SPOILER FOR SOME PEOPLE WHO DON'T WANT TO KNOW ANY DETAIL BUT IT DOESN'T DETRACT FROM THE STORY OR GIVE ANYTHING AWAY.
The very subtle sound of what may be a baby crying in the background, which he never referred to, was very effective. POSSIBLE SPOILER FINISHED.
Nothing is fully explained but you can try and figure it out. You are placed into the centre of the mystery and our 'hero' with the camera is our avatar. So, rather than have it conveniently explained we just have to go through what he went through. There was quite an original soundscape too. Although, the genre is now full of tropes and even cliches, this particular effort felt quite fresh in places. The man with the camera was neither hysterical nor completely sceptical...although he was more biased towards scepticism. This kept him emotionally quite even and stable and curious enough to stick around in order to get to the bottom of these strange events. This made his fear all the more believable and palpable as things started to mount up. Overall, almost zero budget, well-paced, likeable protagonist, original soundscape, some very creepy, initially subtle, moments with steadily mounting tension throughout the film. Worth a watch in a very competitive genre.