No, it’s not a documentary. It’s fiction.
With that out of the way, it’s a neat little film which takes a few pages out of the Blair Witch playbook. It plays the story fairly straight, does some supernatural shenanigans in the back half of the movie - which are clearly telegraphed in the first half so there’s no real shock - and has one of the most ludicrous post credits scenes I’ve seen in a while.
It has the feel of a podcast. The entire runtime of the movie seems structured more like a single season of a podcast than an actual film, from the sound editing to the hitting beats, telegraphing beats, and then summarizing the same beats moments later. That’s not necessarily a bad thing - podcasts are popular for a reason. It’s just a bit odd seeing a movie that’s closer in structure to fully audio media than it’s visual brethren.
I paid a dollar for it on iTunes, and I more than got my monies worth. If you like mockumentaries I’d give it a go.