Film and movie are two words with the same meaning with different usage. They both refer to motion pictures, a medium of expression where a series of pictures give the illusion of motion when projected onto a screen.

Film is more commonly used by those who work in the motion picture industry while movie is more usually used by consumers.

Although the trend moves towards equal frequency in usage, film is still more often used in the written format while movie is more commonly used in the spoken language.

The nuanced usage of the two words gives films an artistic but pretentious connotation and movies an entertaining but crass commercialized production.

SOURCE:

http://www.differencebetween.net/miscellaneous/difference-between-film-and-movie/