Well, I think probably the biggest barrier to becoming a Youtube celebrity is most people do not have top 10% looks like seems to be necessary for most people to consider watching you on youtube. But I guess there are some exceptions like Casey Neistat, who is ugly due to his noticeably retruded maxilla, and yet he is an extremely popular youtuber. I wonder what it is that draws people to people like him in spite of his subpar looks.