This has been extensively discussed in another thread. As I said there - this news article is misleading. She was not arrested simply for the leak of the video (and at the time the video was leaked, this abuse story was well known and had caused outcry in the Israeli public sphere; the soldiers involved were arrested). The more serious part of the story in legal terms, and why she was arrested now, is obstruction of justice. It is a very complicated case, but in short: when the abuse case happened, there were far right protests against the arrest of the soldiers concerned, including attempts to discredit the justice system. According to her own letter of resignation, Tomer-Yerushalmi decided to leak the security camera footage to Channel 12 News in order to protect the justice system from far-right accusations that soldiers from Sde Teiman were being arrested with no basis. However, her office later covered up the leak, claiming in an affidavit to the Supreme Court that the source of the leak could not be traced. This was done with the knowledge of several people in the legal system; there also seems to have been an attempt to destroy evidence (she is believed to have thrown her phone into the sea). All this is why she was arrested now: despite Bibi's spin, it's not because she uncovered abuse that was hidden - it was already a very well known and widely reported case.