It takes a little while to figure out exactly what's happening in Yeasayer's new 'Longevity' video, but once you realize what you are watching -- that is, singer Chris Keating and the rest of the band going through an accelerated aging process -- it's hard to avert your eyes. There's something captivating about witnessing Yeasayer, in some ways the epitome of the eternally youthful hipster act, getting wrinkles and growing gray hairs right before your eyes. 'Longevity' is the first single off their third album, 'Fragrant World,' which dropped last week.