Welcome!
Glad you could join us. There's some awesome people here that can offer up good advice.
I'm going to be frank in telling you what I thought about the trailer considering there is very little I can say. Okay...
It's just images and music you pulled off the internet, mixed with some text. An amateur video maker could throw something like this together.
Also:
Instead of that long description....
A family is tortured in the basement of their home by a sadistic plumber.
Much easier and quicker to read.
Also:
Where are you in making this film?
Short? Feature?
Distribution plan?
Who is this film going to be seen by? It seems like the most viewed films on your channel have nothing to do with film, but with other topics (the most views from a makeup - eyelash video, which are probably where most subscribers are from.
I'd recommend you get a casual channel and a filmmaking channel. Kittens and sadists who torture families don't mix well.
Best of luck with the project.