I watched this video too. Although I commend the rider on his patience AFTER the driver got out of the car, I also don't think it was entirely necessary for him to follow the guy.
Yes, his driving was irresponsible, but it's not the rider's responsibility to reprimand the driver. Although we all should do our bit in trying to make the roads a safer place, following somebody to a parking lot to be able to do that is also not the best idea, because your intentions are not known to the driver. This could cause a dangerous situation.
In my opinion, this driver should've been left alone after he passed the other cars in front of the rider. Motorcyclists are already vulnerable, and viewed as hooligans by the ignorant. If the danger is out of your space, leave it there.