It's nigh on impossible. Either
(a) Famous Youtubers try lead such a movement, but the big hurdle here is they rely on Youtube money as their income, jumping ship to give a new site the necessary momentum could mean they're left without an income for a long time.
or
(b) Conservative Youtubers who have already lost their incomes to demonetisation, account deletion, etc. lead the movement. In which case regular Youtubers will avoid it like the plague for fear of being called racist.