Devil's Tower (2014) online

Sarah (Roxanne Pallett) has just moved into a block of flats to start a new life away from her abusive mother. There, she strikes up an unconventional friendship with squatter Sid (Jason Mewes). When Sid's friend Paul goes missing, he and Sarah unearth a series of strange deaths and disappearances. Watched by a malevolent spirit controlling the building's televisions and cameras, reality and fantasy merge as events are twisted into a sick movie on a TV set high in the block of flats. Sid and Sarah are thrown into a fight for survival when the vengeful ghost controlling a horde of zombies possesses Sarah's mother (Frances Ruffelle). Evil suddenly has a familiar face.