Why are variables being named after specific songs?

At the end of the video when creating the playlist in app.js, why are the variables being named after specific songs in the global table? Is that the correct way to do it?

var playlist = new Playlist();

var hereComesTheSun = new Song("Here Comes the Sun", "The Beatles", "2:54");
var walkingOnSunshine = new Song("Walking on Sunshine", "Katrina and the Waves", "3:43");

playlist.add(hereComesTheSun);
playlist.add(walkingOnSunshine);

Thinking about it logically there will be more songs and some may have longer or even odd names names making for less simple and sexy code. Would it not make more sense to go with a more generic variable standard for this list that can represent any song added?

Consider having to add something like this to be worked with more than once inside of your coding:

var mmmMmmMmmMmm = new Song("Mmm Mmm Mmm Mmm", "Crash Test Dummies", "4:02")

My approach would be different and this may come from my past with databases and having a consistent pattern, nomenclature or abbreviation for everything where each one represens a variation of a variable)

var track1003 = new Song("Say It", "Tory Lanez", "3:56");  // naming convention:   ' "track" + id" ' [beginning at 0001]  OR  
var trackFour = new Song("Let It Be Me", "Ray Lamontagne", "4:13");  // naming convention: ' "track" +  "number" ' [spelled out if under 10 songs] OR
var sId3005 = new Song ("This Womans Work", "Maxwell", "3:58"); // naming convention: 'songid' = sid   OR
var song1008 =  new Song("Mmm Mmm Mmm Mmm", "Crash Test Dummies", "4:02"); naming convention: ' "song" +  "####" ' [song + id]

playlist.add(track1003);
playlist.add(trackFour);
playlist.add(sId3005);
playlist.add(song1008);

I know that variables can be what you need them to be but I'm wondering if there is an advantage here in some way or just personal choice. This may be obvious in later videos just curious.

Also it looks like these are on the global table is that the correct location for them?