TL;DR: Don't bother. There isn't a single redeemable quality to be found.
This indie "horror" drama from writer/director/editor Mark Mos is one of the worst attempts at found footage I have ever seen. The film is boring, features a laughable script, and fails on all fronts.
There are soooo many scenes that do absolutely nothing to advance/enhance the plot. The acting is stiff and awkward (especially the red head who can't seem convincingly scared to save her life). On top of that, the characters are poorly written and kind of annoying. Most of the dialogue is just plain stupid.
When the twist is revealed, you will be laughing your butt off. It's delivered in such a stiff and so-bad-its-funny kind of way. I really don't even know how to describe to you how lazy and stupid the twist feels. I'll admit it was a decent idea, but like all other aspects of the film, it is a total fail.
The editing is nonsensical, confusing, and amateur. There are countless interjections of the same exact static and white noise effect. So many in fact, that I lost count after the first 30 minutes. I wouldn't be so critical if the director was new to the film industry, but his IMDB page says he's been active since at least the late 90's. I haven't seen any of the other projects he has worked on, but "Cause of my Death" appears to be a failed effort from a completely talentless director. (Oh excuse me... director, writer, AND editor...)
We need to talk about the soundtrack... Oh man is it bad. Not only does a soundtrack have no business in a found footage movie, but it significantly cheapens the atmosphere of an already low-grade movie. It's like a bad 80's b-movie and some low-tier, homemade acid house or something.
Terrible film from a no-talent director.