The movie extracts:

People are demonstrating in front of a building with placards.
They are very angry.
Maybe it's a school:
   * The director closed the school
   * The director is a murderer
   * The food was poisoned at the canteen
   * The teachers are not professional
   * The teachers were not paid
   * Children were hit by some teachers

-> There are many policemen

Hypotheses:
Maybe .... / Perhaps .... / I suppose ....