It's like the good old days of pirate videos, whee someone would take a camera into the cinema and record the films straight off the screen!!
The first footage from '
Terrifier 3'
From the description on YouTube:
"This is a first look at Terrifier 3 after the showing of Terrifier 2 during the special 2 day theater re-release. (Sorry for the quality, but I tried my best. They turned on the lights just before the premiere started)"