Lex....you are a master interviewer. Your questions are deeply reflective. YouTube should hire you as a consultant as I think you gave them a ton of "bigger" ideas to reflect on. Your guest didn't seem to express the vision for deeper algorithms and predictive data generation and all the things that neural networks promise. If YouTube doesn't inject some more visionary thinking into their organization, they may stagnate in to just becoming the next television. It can become so much more!