Six films to watch this week

‘Backrooms’ is a deadpan horror directed by a 20-year-old YouTuber; Dustin Hoffman and Leo Woodall strike gold in cracking crime caper ‘Tuner’; Paul Rudd and Nick Jonas hit highs and lows in ‘Power Ballad’; ‘Moss & Freud’ dramatises a collaboration and kinship; ‘Star Wars’ spins off with ‘The Mandal