Are you open to West Coast schools?
Chapman and LMU would review you holistically, looking at your GPA in context of your competitive boarding school, and both have excellent film programs.
Other good options might include Emerson, Ithaca, BU, Goucher, RIT, DePaul, and Purchase.
Do you have a portfolio? Many schools will give additional weight to the strength of your demonstrated artistic output,
which could make you slightly more competitive for the USC’s & NYU’s film departments.