And in the usual way of the internet, one click led to another, and I found this great piano solo by Jarrod Radnich.
Which led me to this video about people who have never read or seen Harry Potter, but attempt to explain what it's about using the info that they've heard about the books and movies.
I could have gone on and on. There are videos (the Honest Harry Potter trailer; the Everything Wrong With...videos regarding the errors or odd things in various Harry Potter movies). There are blooper reels, trailers and more.
Then there are the "Which Harry Potter Character Are You?" quizzes. There's this one.
And also this one. (I'm sure there are more, but I stopped there).
Just putting the words Harry Potter in a Google search turns up 226 million results, but maybe I should just take the time to watch some of the movies or read some of the books again. I'm clearly in a Harry Potter mood!