YouTube? It's the second largest social media site in the world:
Youtube is successful coz of google infrastructure not google decisions/methodology.
Now Google is trying to move Youtube into becoming a hollywood-lite experience and providing major support to entrenched hollywood celebs like will smith/brie larson(they even bypassed monetization policies for larson - her first video launched with full monetisation in play)
They have tried to launch at least 2 of their own, and both flopped hard.