Nike running advertisement - music and lighting analysis of running through a tunnel (Thea)

I know that this is an advertisement, so it is created to appeal to consumers and potiental customers. However, the music and the mise en scene are very useful.
At 0:08, the music begins to fade in and it appears to be in time with the couple running. The music has a steady pace and a reliable rhythm. This will be essential when we are recording the sound effects and music for our opening. As the music develops, it has a 'unorganised' feel to it. It appears to lose its steadiness and pace although there is a clear cymbal or tamberine (Im not sure! but its some sort of percussion) which keeps the pace so its still recognisable and relating to the pace of the running that the couple are doing. Although, the unorganised, amateur and cluttered feel that the string instrument has reflects the hecticness that the couple are having trying to out-run each other.

At 0:34 - 0:37 the couple run through a tunnel. For around one second (maybe slightly less) the couple are no longer clearly visible due to the lack of lighting in the tunnel as they run through. There is some background lighting which makes the couple appear 3D as they stand out from the shadow. However, it appears to only be natural light and not manufactured. Which is effective when trying to make a clip/film authentic and therfore believable (especially in advertisements).
As they progress through the first tunnel ( 0:35 ), the lighting appears to get brighter which makes the couple much clearer to see so there is less confusion.
The couple then progress to go through further tunnels of which they are clearly lit and then poorly lit. This means that the viewer has to look closer and concentrate more on the visible mise en scene in order to follow what is happening. This is especially useful to capture the attention of the audience.
This may be effective in our opening project, although we do not want the audience to not be able to see the protagonist's facial expressions clearly as this is vital to portray the feelings that he is experiencing at the time.