final List<String> myList = [
"2: test1.mp4",
"3: test2.mp4",
"4: test3.mp4",
"10: test4.mp4",
"11: test5.mp4",
//We are splitting each item at ": ", which gives us a new array with two
//items (the number and the track name) and then we grab the last item of
//that array.