So this idea may completely tank, but let's see.
A poster names a movie or a song. Then the following poster, if they know the movie or song, will give their personal rating from 1-5 (in increments of 0.5).
Of course, there's YouTube to look up the songs.
So let's see how this works.
I'll start off with a movie everyone should know.
Star Wars Episode IV: A New Hope