I have watched the video, and like others have said it is too long, very boring, and to be honest needs to be much tighter in many ways.
Here are some easy suggestions on making videos like these more interesting.
The size of the car in frame has to be bigger, even if it is a distance away, or when you edit cut into the car when it is a larger thing to view.
There are little or no cut aways, shoot other shots of people watching the cars, even someones face as they watch the action, shoot between people, give the video a feel as if others are interested.
Shoot different angles, get down low, dutch tilt, do anything to get away from all that straight up and down stuff I just watched.
Add some zing to the video, it needs colour correcting, get some chroma going, bring out the colours of the day, try to steer clear of slow motion stuff, if anything just speed up the video a little, say 10%, it will give selected shots much more impact.
Well what would I know, I just work with potato heads and very small trains..!
Leo.