I love a Very Potter Musical

Back to spells and enchantments and potions and friends
Back to griffindor, hufflepuff, ravenclaw, slytherin!
Back to the place where our story begins at Hogwarts, Hogwarts!

If you notice, he's wearing that sweater because that's what Harry wears on the cover of the first book

I didn't notice that

Don't worry, it took me multiple times and having the book on my bed while watching it to notice

A Very Potter Musical, I can't think if it's the sequel or not

Thank you