Facebook had argued that the user who posted the video had done so from a fake account and said it had erased all information relating to the post from its servers, along with the video itself, in February.

The woman who launched the suit against Facebook has appeared on Dutch television identifying herself as Chantal, 21. She described the suffering and humiliation she has undergone since the video was posted.
The video, in which the woman is recognisable, was made by a former boyfriend when they were both minors. He denies any involvement in the posting of the video online.
Although it was removed from Facebook within an hour of being posted, the video was downloaded and then further circulated on the Internet.
"Facebook has a legal obligation to provide the information because the unknown person acted illegally and the information cannot be obtained elsewhere," a court-issued summary of Thursday's decision said.
"If Facebook continues to maintain that all data that could lead to a person are definitively deleted from its servers and no longer traceable, that should be confirmed by an independent researcher," the ruling said.
Facebook, which is the world's largest social media network, did not immediately respond to a request for comment.