The vocalist/pedestrian is in his own world as the video continuously shows he is unfazed by the world around him.
The video is also a commentary on life in general, how you can't let others derail you from accomplishing your goals, because many will try.
It could also be a metaphor for how many people are unaware of how their actions affect others.
Several times he knocks people over and doesn't miss a step or stop, showing how many people will willingly step all over someone to get what they want.
The concept was inspired by the video for Massive Attack's 1991 song "Unfinished Sympathy," which was showed the singer walking down a street in a similar manner.
And the video has never been more relevant: we need to continue moving forward, no matter what obstacles or challenges are in our way.