#BBCtrending: What makes a video go viral?

Of all the millions of videos posted online each day - of cats and kids, sports and war, mundane moments and earth-shattering events - how do some clips rise above the fray?

In other words: what makes a video go viral?

BBC Trending talked to social news luminaries from Gawker, BuzzFeed and Mashable to find out what elements are more likely to make a video trend.

And if you're interested in virality and the new world of news, the BBC Radio 4 documentary 23 Amazing Reasons This Radio Programme Will Change Your Life, presented by Trending's Mukul Devichand, is a must-listen. If you like it, share it with your friends. (But then again, we would say that, wouldn't we?)

Video Journalist: Alvaro Alvarez

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