"This film about X is set in a prehistoric times....." "The thriller directed and co-scripted by Y, failed..." "This low-budget horror film, released last week, is worth noting..."
Before anyone can write a movie review, he should learn how to write the proper question; first by capitalizing and lastly end with an appropriate punctuation.
" How do you write a movie review?"
What you had is a statement suggesting how to write a review. to a prospective audience.