Insanely detailed. A sample from the 2700 word commentary on my favourite Beatles song You’ve Got To Hide Your Love Away:

The form is a cross between the two-bridge pop song and the verse / refrain alternating folk ballad, with a central unit of two verses plus a refrain repeated twice, preceded by a scanty intro and followed, quite unusually, by an instrumental verse that wraps the whole thing up. The verse pairs are internally differentiated between a “primary” version and a slightly modified variant that leads more smoothly into the refrain.