the dvd in court

Even in American courts, it probably could have been introduced. Discovery law places the most significant burden on the prosecution regarding disclosing evidence. Defense usually only has to provide the names of alibi and expert witnesses and any defensive strategies that will fundamentally alter the normal procedures that the prosecution will use to make their case, such as an insanity plea. The prosecution has to disclose everything they have, even exculpatory evidence that they have and do not intend to use.

The prosecution might argue that the dvd should have been presented in discovery, but in this case, the defense could argue that it would be exempt from discovery law because it was rebuttal evidence presented in response to sworn testimony that occurred after the discovery phase of the trial.

(The dvd was presented to refute Teleborian's testimony that Salander's description of the rape was clearly a fantasy, and proof that she was incapable of distinguishing reality from delusion.)