His embarrassment is his unprofessionalism and being ignorant. He has worked hard to build a reputation as someone who is reputable. People can talk shit on him if they want to, but Linus is good at what he does, and he works hard, and he knows his stuff. He's very clearly annoyed at himself, because he takes the responsibility seriously. He knows that literally millions of people look to him for consumer-digestible, accurate gaming and enthusiast tech info. That reputation is not easily earned, and it is very easily lost. People will try to poke holes in him and find biases and things, but he's been very consistent and earned the respect even of people he criticises. He personally knows people from every manufacturer, platform holder, storefront, retail chain, etc. out there. This is very important to him that he maintains that.
It's not about the hard drive. It's about his being an ass and acting smug when he was wrong, and he's owning up to it, and trying to fix damage he's caused, because he's now made the life of someone whose respect I'm sure he'd like to have, a lot harder for no reason other than his own pride.
That's pretty mature of him to overcome that pride and put in an A+ informational reversal. Like seriously, this is one of the best videos I have now for referring people to about the subject.
Maybe more people should be able to own up to when they're smug assholes....
Anyway, about the music too, like, ehh, that's how LMG is. They always have a weird flair for the dramatic and kind of sense of humor that crops up weirdly, but that's their personality. What he's doing here is mature, and professional, and I wish more people would act like he does here.