YouTube has long been known as a place popular among younger viewers, but what happens when those people get older? For Brian Albert , the executive who represents the Google video-sharing service in its negotiations with Madison Avenue, the answer is simple: They keep watching YouTube. “The older millennials will turn 45 this year, and they really are the first generation to grow up with a supercomputer in their pocket. To them, there really is no difference between streaming a video on their TV screen and scrolling video in a feed” says Albert, managing director of YouTube Media Partnerships & Creative Works for Google, during a recent interview. “As they grow older, we just don’t expect them to consume media the way their parents did.” As executives from Google and YouTube will make plain during a presentation to advertisers Wednesday evening, now people in older cohorts are well-versed in watching selections on YouTube.…