In citing film and other media, use the citation form for the format in which you watched the work being cited.
For example:
- If you watched the film Casablanca on DVD and want to cite it, use the citation format for DVD (not the film original).
- If you watched Casablanca in a movie theater, use citation format for film.
- If you are citing a documentary or program that you watched on DVD/videotape, but which was originally broadcast on television, use the citation format for DVD/videotape.
- If you are citing a trailer for a theatrical movie that you watched on the internet, use the citation format for online resources.
From the UC Berkeley site.