Film theory seeks to develop concise, systematic concepts that apply to film and video. Classical film theory provides a structural framework to address classical issues of techniques, narrativity - , diegesis - , cinematic codes, "the image", genre, subjectivity, and authorship. More recent analysis has given rise to psychoanalytic film theory, structuralist film theory, feminist film theory, and theories of documentary, new media, third cinema, and new queer cinema - , to name just a few. See also film criticism.
For specific theories of film, see:

psychoanalytical film theory
feminist film theory
Marxist film theory
formalist film theory
structuralist film theory
genre film theory

Film History Theory

great man theory

Auteur Theory is similar to film history theory but auteur theory focuses on historical developments, rather than actual movies as Film History Theory does.