YouTube’s PPC advertising platform has established itself as one of the most important available to marketers, with the news that 1 trillion videos were watched on the site in 2011.

Making the announcement via its blog, the Google-owned site announced that is saw 1,000,000,000,000 playbacks of the videos on its site, roughly the equivalent of 140 videos watched by every single person on earth, t3.com reports.

The count wasn’t made up entirely of talking dogs and people falling over, however, with experts suggesting that YouTube’s stratospheric growth has news and current affairs to thank.

With 2011 being billed as “the year when a lot happened” by BBC News, the rise of citizen journalism meant that world events could play out on the channel, giving consumers much more direct feeds to the events unfurling around the world.

Speaking to pocket-lint.com of how the figure was reached, YouTube’s trends manager Kevin Allocca explained: “To compile the lists, we looked at global view counts of popular videos uploaded throughout the year, and, in some instances, we aggregates views across multiple versions of the same video.

“2011 was a year of amazing new channels and new stars being discovered, awesome creativity and of course, Rebecca Black. It was also a year of powerful news stories playing out on YouTube, as people witnessed and documented uprisings and natural disasters, touching personal moments and moments of protest.”