When we smile we feel good, and if something makes us smile we want to share it with the world. That’s why one of the best ways to get people to share your videos is by getting them to smile and feel good. If you look at the most-viewed YouTube videos of all time you’ll notice that many of them will put a smile on your face and warmth in your heart, from Susan Boyle to Free Hugs Campaign. Last week a new “feel good” classic hit YouTube as a Copenhagen bus driver got the birthday surprise of a lifetime.
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