Host

Host is a 2020 British independent screenlife supernatural horror film directed by Rob Savage, who co-wrote it with Gemma Hurley and Jed Shepherd. A screenlife film that takes place entirely on a Zoom video call, it follows a group of friends who inadvertently summon a demon during an online séance.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.