How they found out.
He used a camera on an IPad, correct? All cameras on any device are hackable. Now let's say that he also installed Sky Go on that IPad. I know from my cousin who works in the telecommunications industry that Huawei have a back door built in to every device they sell. If there are any Huawei users here do not store sensitive information on your device, if it has any Huawei component. I'm am sure that Sky asked Apple to find out who had livestreamed the performance. Or they found out from Facebook, who would have sold them the information immediately. Facebook in its terms and conditions owns everything you post on it. Simple they asked Facebook and got the information on who livestreamed it. More complicated they used their own app whilst it was being livestreamed to figure out the ip address and found out who it was. It's exceptionally easy to hack a live stream of more than five minutes. What we need to know is who made the cameras for the IPad. If it was Huawei then we know that sky asked them to find out. If it was another company then it's their backdoor. Apple as you know has a backdoor because the US government tried to force it to give it up. So either Apple or the camera manufacturer hacked the livestreamed feed.