Works van being driven in a manner that could have killed someone

What to do and how to approach a double mini roundabout?
Approach roundabouts with the intention of stopping, but look carefully as there may be time to move in safely, give yourself time to react, expect the unexpected.
Click on the You Tube clip to see the incident towards the end of the clip.
Play it a few times and stop at 1 second intervals, an accident waiting to happen.