Zach, Tom,
Good to catch you folks for lunch.

Here is the "song exploder" link I was thinking of:

Song Exploder: The Secrets of La La Land’s Pivotal Final Number
http://www.vulture.com/2016/12/song-exploder-inside-la-la-lands-audition.html


And from the NY Times:
‘The Middle’: Watch How a Pop Hit Is Made

https://www.nytimes.com/2018/04/22/arts/music/diary-of-a-song-the-middle-zedd-maren-morris-grey.html?rref=collection%2Fsectioncollection%2Fmusic

Best,
Fred