The overwhelming vast majority of current music has absolutely no staying power, is uninspired, lyrically lazy, copycat rather than influenced and repetitive beyond belief.
Every so often a really good song will come along but it is rarer and rarer because so much of a piece of music is focused on how the visual presentation will be.
All of the above is my opinion and your mileage may vary.
And in fact someone was playing it. Playing it, indeed.
I said to Mrs. S, "That guy can play. Or girl, whichever, but that person can play."
"Dance of the Goblins", Antonio Bazzini, Op. 25, performed by Itzhak Perlman in Russia.
Here's a link:
https://www.youtube.com/watch?v=-GfnR0OOxI4
Back to the OP's point, I don't believe it has any key changes in it.