A decade is a long time. I mean, just think back to the end of 2009.

Barack Obama was about to enter his first full year in the White House, Farmville was the flavor of the month with 83 million monthly users on Facebook, and Avatar had just hit movie theatres worldwide, becoming — at the

time — the highest-grossing movie ever.

But even then, ten years ago, people were already starting to make big predictions about online video, and its potential to change the world of marketing.

Not all predictions come true — but, as we reach the end of the decade, it’s fair to say that these ones certainly did.

If any marketing trend can lay claim to being the defining tactic of the last ten years, video is surely up there.