Wow. This is bad. There's no story, characters or tension. Basically this is just some dude poking around on the web viewing different "extreme" videos. So, the different "stories" are just clips of people doing supposedly weird, violent and sexual stuff.
In this movie, the guy is supposed to be on the Deep Web as the title says,but the problem is that you can easily find content much more extreme and disturbing on the web without having to go to the deep web.
So then what is the purpose of this movie? There are no characters developed to care about, no stories to capture your interest and absolutely no tension from which to derive any horror. There's just nothing here.