Vlog update + question

Can youtube take down your videos if you appear on another youtube channel? William from Redzilla Stuudios won't be in my vlogs because youtube wants to take down some of his videos since he's in my vlogs. I don't think it's true. I think It's fake. I've been trying to see if this is a real thing but there's no answer to my question on google. It's a sad day. I may just end my vlogs because I don't like this treatment. Bye :(