Released in 2013, Zachary Donohue’s “The Den” is a nasty and tactile horror movie that uses screenlife in a way that predates “Unfriended” and “Unfriended: Dark Web.” Its screenlife storytelling is largely driven by video chats of all kinds, and it uses the expansiveness of the internet and the limited angles of a video camera to create a deep sense of fear.

The Den is like a Chatroulette-type of website, where millions of users can meet others from around the world, and have a video or text c