Had my brother not found out about the paedophile nature of his friend only after he was arrested.... what would he have said, if online people had accused said friend of other things?
I imagine first and foremost if one of the incidents was when my brother was around, he would easily be able to say "I was with him, that never happened"..... perhaps forgetting a solo trip the friend may have made to the loo, or went back to his car for something. I also imagine he would (along with other good friends) have taken him to task over this, and when satisfied that these allegations can't be true for X, Y, Z reason, would most likely have believed their friend.
It is entirely possible, as someone said it's the nature of a sexual harasser, manipulator to lie, that Shawn did hear about things, but he himself was satisfied by what he had been told, evidence perhaps he was given him in defence of this person, that his friend had done nothing wrong.
To be quite honest, if my good friend was being accused online, I would be asking them first about everything, and if I was thinking "no, it couldn't possibly be", that wouldn't make me a bad person, even if it turns out I was wrong.
That's why so many families get torn apart when you do find a person you thought you knew, you thought you could trust be carted away for things you never had believed were possible.
If said person were to appear in a video - which I highly, highly doubt - then I wouldn't watch it.
I don't think knowing someone on his channel is more than likely going have charges pressed is a reason to stop watching Shawn and Charlotte. The evidence piling up against this person is definitely going to lead somewhere. Just because Shawn was "made aware" of things years ago, doesn't mean he actually had to believe them.
My brother struggled to understand what his friend did, as I said, had he been told earlier of similar things, but by his friend was convinced all was well, that would just make him human.