Since I don't think you even bothered to read the first line in the link, I'll post it here: "Social media are computer-mediated tools that allow people, companies and other organizations to create, share, or exchange information, career interests,[1] ideas, and pictures/videos in virtual communities and networks."
I.e. things like YouTube, MySpace, Facebook, Twitter, Tumblr, Snapchat, instagram even LinkedIn (although it's more for business networking as opposed to social networking but it's still considered in part, a social media site regardless) and there's more.
There's nothing to misunderstand or nothing to seem as though as if I'm trying to fool anyone in what I said:
Saying "No, it was not meant to be a social networking site it was always made to be a video sharing site" is about the equivalent of saying "Twitter wasn't meant to be a social media site, it was meant to be a text sharing site". Only an idiot can deny that YouTube is social media, just because you post videos instead of text or photos. YouTube isn't any less of a social media site just because its core function is to share videos instead of text.
But if you want interpret it differently then fine, there isn't much I can do there because I don't know how else to explain what social media is. And I'm not trying to fool anyone, no 1 here seems to have a misunderstanding of what I said or what a social media site is apart from you, so I was trying to explain what I had said better for you to understand.