TikTok is not a "youth-based social network". It is more similar to YouTube, with content creator ecosystem and advertisement profit sharing and all.
> 41 percent of TikTok users are aged between 16 and 24.
That seems rather youth-heavy when compared to Facebook (Timeline), Twitter, YouTube, Instagram.
Nothing inherently wrong with that, but it does come with risks.
Personally, I absolutely consider YouTube a video-based social network. You follow people/brands, have at timeline, can contribute comments on what they post, etc.
It doesn't tend to have as broad a social graph as something like FB, but almost nothing does. Twitter (for example) also has a large number of popular public accounts, similar to YouTube.