DeDup the videos to get correct # of hours (Score 1)

It's not true that "If you were to sit and watch a billion hours of YouTube, it would take you over 100,000 years." YouTube did not DeDup the videos; if the billion hours were all of one video, then it would only take an hour to watch those billion hours. A more interesting take would be how many different videos are watched (w and w/o porn). Sometimes
1) repetition would be interesting (most popular cat video, or porn), and
2) maybe some scientific or how-to videos are important even if they are only seen a few times, since they are like entries in a dictionary that are rarely looked at, but vital for completeness