WARSAW, Poland – Israeli Prime Minister Benjamin Netanyahu's office on Thursday released a video of a closed meeting in which senior Gulf Arab officials play down the Israeli-Palestinian conflict, defend Israel's right to defend itself, and describe Iran as the greatest threat to regional peace. The video, bearing the insignia of Netanyahu's office, gave a rare glimpse into the behind-the-scenes contacts the Israeli leader frequently boasts of, but which are rarely seen in public. The video was recorded on a mobile device and it was not clear who took it. Netanyahu's office briefly made the YouTube video available to a...