YouTube has not deleted Russell Brand's channel. Go look, it's all still there.
They did stop running advertisements on his videos, called demonetization. YouTube has contractual obligations to their advertisers, and those reputations, and their own, to consider, along with the opinions of millions of other users.
That’s frustrating but not illegal or evidence of a conspiracy. Relying on YouTube or any social media platform for an income has some risks, just like most jobs that can lay you off or fire you for no reason.
Russell Brand was supposedly making $1M/mo on YouTube until a few days ago. That’s pretty good risk/reward to me, especially considering he has other platforms to move to.
They did stop running advertisements on his videos, called demonetization. YouTube has contractual obligations to their advertisers, and those reputations, and their own, to consider, along with the opinions of millions of other users.