Running is healthy and benefical anyway you look at, and as it can be done almost anywhere you don't have to worry about gym costs. As for the risks I don't particular give any weight to them, Inflammation for example is mostly caused by overtrainig and lack of strethcing before and after exercise. Simply measures can be taken to prevent Inflammation such as a structured training regime that implements your body's limitations such as having days for rest and then doing the proper stretchs before and after.

I think what makes a video go viral is that if it reaches the news, your friends and family are talking about it and if it is all over the internet and on social media such as facebook. How a video goes viral depends on soceity's intrests and culture at the time take Donald Trump for example while not necessarily a video but because of social media one could argue social media played a significant part in him winning the presidential race.

http://www.forbes.com/sites/panosmourdoukoutas/2011/09/10/the-good-the-bad-and-the-ugly-side-of-globalization/#7bc6d85b3c21

Globalisation is defined as the process in which businesses or organisations (can be non-profit) attain international connection or begin operating on a global level.
In my opinion globalisation can be both advantageous but also problematic as it bolsters the global economy and improves international relations but at the same time it may be limiting society's privacy with mass surveillance programs take the Edward Snowden case for example.
With Thanks Tom

http://www.huffingtonpost.com/suren-ramasubbu/influence-of-social-media-on-teenagers_b_7427740.html

An interesting article on the influence of social media on teenagers and young adults.

With Thanks Tom