If Jesus performed miracles today, you would have great difficulty even convincing people of TODAY that they happened. Even if you video taped them, skeptics would just conclude that the video had been post edited.
Even recently, somebody addressed the UN with his testimony that he had been miraculously healed. Obviously, they don't give crack-pots a microphone at the UN unless they are backed up by independent medical investigations. So this is 'proof' of miracles. So what? Nobody is listening. Nobody wants to know.