Link: https://www.youtube.com/watch?v=FZfXSUOC6Zo

Wrongly imprisoned for his mother’s murder, Niall is finally released, having found God and renounced a life of violence and addiction. Retreating to a remote woodland cabin seeking redemption and the truth behind her death, he finds a hostile community ruled by a ruthless family, where every encounter deepens the mystery surrounding his mother’s past. As brutal violence erupts and terrifying visions blur the line between nightmare and reality, Niall uncovers a sinister legacy of witchcraft, blood sacrifice and forbidden ritual. Something has been patiently waiting in the forest, and its hunger for vengeance can only be satisfied with blood.

https://www.themoviedb.org/movie/1793082-the-cull

The thumbnail on the YouTube video clearly says "Gull".. wonder if it was made with AI or something

Yeah, that threw me off as well. I'm not really sure what was happening there - possibly editing/titling by a non-native English speaker who isn't familiar with difference between the two.

If the distributor cared anything about the media that it's distributing, you wouldn't see this sort of thing. It's genuinely disrespectful to the people who actually made the movie. Masterpiece or mess, at least give enough of a shit to title your trailers correctly.