Think about it, you've been driving with the air on or the windows rolled down. You stop shut car off, lock the doors, shut them, oops baby in car. How long is it going to take for that car to heat up to a detrimental temp?
That's the thing... From a 3 minute video, you don't know how long those kids were there BEFORE anybody noticed, nor how much time passed between that point and the point they decided to act.
The whole "I was just running in for a moment and didn't want to hassle with the kids, so I left them in the vehicle" argument is bull.