Hi Jim - Thanks for taking the time to both listen and watch!
This video was edited by a video editor I work with regularly, who also happens to be a close friend of mine. In this case (and several others we have worked on together) he came to me with a brief of the sort of sound he was looking for and the the approx length he required for the video. He described the type of footage he was working with but I didn't actually see any video while I was composing the track.
I created this track and sent him the first draft mix and we discussed his comments which I addressed in a final mix which he then completed his edit to. He is also a musician, so has a great understanding of the beat and pulse of a piece of music and will often create little moments like you noted where the brake lights are directly cued to a beat in the music - or the section at the end where the melody is rising in both pitch and intensity and he matches this visually with shots of the vehicle climbing up the hills - all subtle but clever stuff!!
Sometimes when I see his draft edit set to my score it will trigger ideas in me to pull little highlights musically to frame the visual action, so I will delve back in and makes the changes.
Thanks again
Chris - SquareSpiral