In Islam having sex outside marriage are forbidden. It was a crime under Syariah Criminal of Enactment. However, this prohibition only provided to muslim society. Syariah Council does not have jurisdiction to the non-muslim. Basically, her confession and sex video you have been recorded might be use as evidence in Syariah Court but its depend on arguements by prosecutor and her lawyer. If you have been threatened by her, i advice you to make police report to protect you if anything happen.I have to remind you, it was a crime under Penal Code if record sex video then use it to threat her. She might be report to police to against you.