Sean Knapp had it made. As a young computer scientist, he couldn't have had a better gig: working at Google, the engineer's paradise. He had all the usual perks - a massage every other week, onsite laundry, free all-you-can-eat haute cuisine. Even better, he got to work on some of Google's highest-profile products, including the search technology that is the heart and soul of the company. And he made full use of his "20% time," that famous one day a week that Google gives its engineers to work on whatever project they want. A little over a year ago he and a couple of colleagues, brothers Bismarck and Belsasar Lepe, ages 28 and 21, respectively, did what many of the young geniuses do at Google: They came up with a cool idea, in this case a new way to handle Web video.