This is exactly right. Youtube has been trying so hard to turn itself into a tv network. Tiktok (for now) is a classic disrupter and has had tremendous success by making something great that people liked. Vine is the more embarassing failure, but YouTube is a close second. For those who dismis tiktok without even trying it, it is hard to convey how fun, interesting, and surprising it can be.
i'm not sure if vine was a true failure. the only difference i see between that and tiktok is the focus on music and the less rigid length requirement.
the users loved vine and it's still quoted in tiktoks
i think it's because china is able to dump money it was able to take off more