Box office might be at record levels, but the film industry is going to sustain these levels, it has to learn to turn the booming millennial social media to its advantage. That’s what Disney distribution chief Dave Hollis conveyed this morning to CinemaCon attendees and exhibitors. Disney’s presentation isn’t until tonight, but Hollis kicked off a series of industry speeches this morning prior to STX’s session. While Hollis praised exhibition in spiking the 18-24 audience…