Rec
The Spanish film follows a local news crew at an apartment building where they are covering an emergency only to be quarantined as an infectious disease spreads through the people in the building.
Host
From a classic handheld found footage film to a mid-pandemic update, another user suggested Host. Host is a film in the still new “screenlife” genre, in which all of the action of a movie takes place on a computer screen.
Skinamarink
The film is an experimental feature film that doesn’t show any characters faces and is largely composed of incredibly grainy shots of dark walls and hallways as two siblings attempt to figure out where they’re parents have gone.
The Wailing
Many people suggested the Korean film The Wailing which follows a policeman in a small town who investigates a series of murders and their connection to a mysterious illness that his daughter seems to have contracted.
The Medium
The Medium is a Thai film that follows a documentary crew who travel to interview a medium who says that she is possessed by a local goddess.
Incantation
Mockumentaries clearly have some serious credibility in horror as the recent Taiwanese Netflix-released Incantation received several mentions as well.