Films always have a copyright disclaimer. That's normal because pirated films are a huge issue and cost film makers a lot of money annually.
Another disclaimer I often see in the beginning of a film is about how "all the characters are fictitious and resemblance to any person living or dead is purely coincidental."
That's another given disclaimer that all filmmakers automatically put in front of a fictional film. It's an easy way to prevent any lawsuits that may come up after the film has been screened. Filmmakers would rather put this and get it out of the way rather than deal with problems later. But sometimes I do wonder if it's even an issue at all.