I discovered this version of the song by the opera singer Jessye Norman done with the composer, Michel LeGrand, at the piano and sung in French. Notice how it is different from the version he did with Natalie Dessay. It is more impressionistic and dreamy – reminiscent of Debussy or Faure. Notice also the subtle, very tasteful, changes to the chord progression in a few places, first at 3:05 and then ever so slightly at 3:28. I also absolutely love the flatted 2nd scale step in the bass at 4:33.
This is one of the beauties of the traditional popular song: when the melody, lyrics and chord progression are well-written, it can be interpreted in many different ways – even by the composer himself.