Edit: It seems I made the wrong assumption about who changed out the song, but regardless, I'm still impressed that someone who doesn't seem to be the author went out of their way to do it. On YT we'd just get a lame ass mute video, if we were even that lucky.
Original review: It's a shame the og song had to be replaced, but impressive @Anonymous-Frog was able/willing to do it. I guess that's a nice hidden feature in flash (may its reanimated corpse lurch on forever).
I don't know what the old song was (other than something by Fatboy Slim), and I am dreadfully curious about the specifics, but I suspect the new song fits much better. It was even picked from around the same time, so probably could have/should have been used in the first place.