They shouldn't, there is no need to prove anything to anyone , certainly not to the Pakistanis. Nor are the Pakistanis going to be convinced by any such thing, they will likely dismiss it as a made up video etc. The Pakistani reaction is proof enough, condemning & having hurried meetings when supposedly nothing has happened. The best thing for us to do is to do nothing. Most Pakistanis, either here or in the general populace are aware that their military doesn't always tell them everything, their track record exists. Let them be in this dilemma, we gain nothing from showing "proof".