Hello new dude
Congrats on shooting your first film! We have some first timers here as well.
I liked the trailer. I thought it has neat music, and some cool shots. But there were a few things that bothered me.
A trailer should get into the story. It should start with a bam. Within a few seconds, it should grab the audiences attention. Unless the film is being produced and/or acted in by big names, you're going to have to grab the audiences attention with something else: excitement and elements that appeal to fans of that genre. Gunshots, screaming, running, action music, fighting, and camera movement. Grab their attention within a few seconds, and hold it until the end. Something has to spark their interest.
Remember to properly set your exposure, ISO, and focus. Also, use a tripod. The film was shaky, sometimes out of focus, and poorly exposed throughout.
Anyway, welcome. And I hope to see more. You obviously have talent, you just have to get more experience and refine your directing skills. Impressive first short. Better than my first