Viral content is something that everyone would love to create however in order to actually be in a position to create one, it would be necessary for you to first go through those that already exist so you can learn all marketing tricks associated with them.
There are different purposes associated with creation of viral content but the majority of people who are interested in creating such content would be marketers who would be looking to get their word out and about.
It can get a little tricky to create viral content for marketing as people do not like promotional stuff and the last thing you could expect them to do would be to share any marketing message that you publish which they would not appreciate having received the first place.
You will therefore have to proceed with care and learn the various tricks that marketers employ when creating content that would be both educational as well as intriguing for people to want to share with others.
If you manage to create a useful product in the market and demonstrate its use through a video that has been professionally created then you could potentially force the entire thing to go viral but it will have to feature things that would be appealing to people who watch them.