They are perhaps having the same function or having similar definition,
~> Films are movies collectively, considered as a medium for recording events, a form of entertainment, or an art form.
and
~> Movie a series of real or fictional events recorded by a camera and projected onto a screen as a sequence of moving pictures, usually with an accompanying soundtrack.
More information: FILM is being used in U.K., Australia, and New Zealand while MOVIE is being used in some English speaking countries.
I hope it could help you in searching the best answer for this query of yours.