Short-form content – the barely-monetizable laughingstock of the content world reserved for phone-obsessed teenagers and laid-back YouTube cat marathons, right? A start-up called ShortsTV is hoping to change that sweeping generalization with a model that has already attracted some of the world’s largest operators. There is certainly a gap in the market for a globally successful subscription-based short-form content offering, keeping in mind that even ad-supported services from giants like Verizon’s Go90 have flopped. ShortsTV’s CEO Carter Pilcher, an aeronautical engineer turned entrepreneur, admitted at the Video Exchange event in London this week that ShortsTV originally got it completely wrong by simply putting short-form movies online and waiting for the views to roll in, almost arrogantly expecting it was…