Yes, that is why the crash truck was there but there is soooo much wrong in that video.
First, there are procedures that need to be followed for any road work, especially for a live lane closure, which this had to be since the left shoulder is not wide enough for that crash truck. See OTM Book 7. That lane should have been blocked a half a kilometer before that work site since all work vehicles were stopped.
Second, the crash truck was too close to the workers. If that had of been a transport that hit him he would have been pushed into the workers ahead.
Third, this looks to me like none of this work was approved by the MTO since that crash truck doesnt have near enough barrels to have even attempted a closure of any kind (one barrel?).
The pickup didnt hit the crash truck square on, looks to have grazed the corner of the attenuator since the crash truck didnt move and the pickup kept going, looks to have tried to avoid at the last second. Who expects a truck to be sitting in lane one, arrow flashing or not, without some prior warning?. That crash truck driver and company are probably going to be in for a world of hurt if the MOT got involved.