That does not fukking matter. If someone worked at a job and upper management found out they did some foul shyt while at another one, they are getting fired. It makes you look bad to associate your company with someone like that, because it could lead to PR issues and loss of money.
What do you expect them to do, say "That shyt is fukked up but at least you did not do it while you were here, you are good to go"? Hell, at some point they may shut his whole channel down. This is a company that has the absolute power to shut your shyt down just because it was raining, so what do you think they would do to someone admitting to sending sexual texts to kids?