Watched the video several times and noted the following;
The officer had stared toward the sidewalk before the rider comes into view.
The officer did not raise his hands to push the cyclist.
The cyclist made no attempt to avoid the policeman or stop.
You can see the cyclist lower his body from his riding position and lean toward the officer just be for hitting him.
Pedestrians to have the right of way over cyclists and from the time the officer started to wards the curb and lack of other traffic the cyclist could easily have passed behind him.
There is no indication the cyclist made any attempt to slow down.
From what I saw it is possible the cyclist wanted a confrontation.
By the way this is from March of 2007 not last year.