I didn’t mind UG’s videos much, he was a little better than the average YouTube, but after how he handled this, in my opinion he doesn’t walk upright like a man. The way he is handling it so far, the truth will never be told by UG.
While I agree with the gist of your attitude, in the world we live, any admission of error can leave you open to legal issues. It's possible he wanted to avoid risk of that nest of vipers.