Nice article crunching those large numbers and a topical reminder of climate change (which if you haven’t heard of, you must have been sleeping next to Walt Disney for a while, and congratulations on the medical breakthrough that got you revived…)
I suspect YouTube will be even higher this time next year. Google is at no. 4 and could conceivably be even higher as they guard their data as the article mentions. On the subject of Google watching, there is an article on Sergey Brin here.