I don't "follow" any, but some I return to often. Nothing related to preparedness though.

When I'm learning a new classical piano piece, I often go listen to a recording of it performed by this performer. She even the terribly difficult stuff look easy:

https://www.youtube.com/watch?v=iotQkDWiwCs

If I want to hear an analysis/breakdown of a more recent song, the "What Makes This Song Great?" series by this guy is fantastic:

https://www.youtube.com/watch?v=PWp417CF7fY