Notice, the driver making the video was camping out in the left lane.
Notice every single car in front of him being over in the right lane, like you are supposed to be when you are not passing anyone. The driver making the video actually caused the unsafe conditions which led to the accident. If he was over in the right lane like he was supposed to have been, the motorcycle would not have had to pass him on the right. This accident you see is exhibit A of just how dangerous it is to have to pass to the right.
People hanging out in the left lane shouldn't worry themselves with someone else exceeding the speed limit. That is the cops' job to handle that. They're not creating the unsafe driving condition (unless they're going 90 mph, of course). Hanging out in the left lane is what is causing the unsafe driving conditions.