There've been a lot of found footage horror films now, ever since the Blair Witch Project kicked off the craze (and earlier movies to that too, though less well known). This is one of the better ones imho. As ever with horror films, one asked WHY DIDN'T THEY XYZ? But then if they left or called authorities there'd be no story...and/or a bigger budget.
It's clearly low budget, as are many horror films, especially those who use the haunted house trope. Some may be disappointed at the lack of gore or CGI/model monsters etc. But it's not that sort of film.
I wanted the ancient Greek demon story to be outlined more - there is no mention of Mormo anywhere in the script, not that I heard anyway. Mysteries are great, sure, and too much reveal can spoil a story BUT so can too much concealment and esoteric hinting at things and mysteries never expanded upon. I found that annoying anyway.
It ends abruptly in the framework of an investigation trawling through footage found on phones and digital devices. The first part of the film works best.
3 stars