The Marvel of Mozart’s Letters
spectator.co.uk
spectator.co.uk
Though the piece I like best from that film is "Profit & Loss", which has invented lyrics based on Mozart's finances & his father's imagined reaction to them: https://www.youtube.com/watch?v=q9Ts9GoBv1s
https://www.youtube.com/watch?v=C78HBp-Youk
For connoisseurs, it's Köchelverzeichnis 382c