If you wanted to cite a film or movie in MLA format, you would use the following format:
Title. Director(s). Film studio or distributor. Year. Format.
The History Channel documentary DVD The War of 1812 was directed by Gary Foreman, through the film studio A&E Home Video. It was distributed by New Video in 2005.
Using the information above, the citation in MLA would be:
The War of 1812. Dir. Gary Foreman. A&E Home Video. New Video, 2005. DVD.
If your paper emphasizes performers within the film or movie, insert them with the prefix "Perf." after the director listing, followed by the actors.
If your paper focuses on the director or the performers, place the respective person(s) at the beginning of the citation:
Foreman, Gary, dir. The War of 1812. A&E Home Video. New Video, 2005. DVD.
To cite a film found online using MLA, you would use the following format:
Director's Lastname, Firstname. "Title." Date released. Online video. Collection. Accessed on Day Month Year. <URL>.
The 1944 film The Fighting Lady, directed by William Wyler, can be found in the Cinemoracy collection online at https://archive.org/details/FightingLady
Using the above information, the MLA citation would be:
Wyler, William. "The Fighting Lady." 1944. Online video. Cinemocracy. Accessed on 7 July 2014. <https://archive.org/details/FightingLady>