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Ever wondered what makes a video go viral? As an online science video producer I’m constantly mulling over this question, trying to figure out the right formula of content and style to create a popular video.

Some students of YouTube claim that viral videos have common characteristics.  Kevin Nalty, a professional marketer and “weblebrity” with over 187 million views on YouTube, thinks he has the formula at least partially figured out. He writes in his  book “Beyond Viral: How to attract customers, promote your brand and make money with online video” that viral videos tend to include these types of content:

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