Re: O Holy Night (Citation needed)
I get the strong impression you have little real world exposure to the day to day workings of the music biz over the last few decades.
Indeed, I have nothing but contempt for the so-called music biz, and no direct knowledge of its day-to-day working. However, I do both listen and perform on a reasonably regular basis. I've also done a little composing, broadcasting and recording, so have a slight level of indirect exposure to some of it.
I'm well aware that copyright abuse happens. I'm also well aware there are lots of stories floating around based on misunderstandings. Nothing posted here enables me to classify your story beyond reasonable doubt as one or the other.
If someone presented a firm case, the Googlers I occasionally encounter are those who work in Free Software. People who believe in copyright but detest its abuse. People who might raise a fuss and would carry weight internally if presented with clear evidence that youtube was complicit in abuse.