I see a lot of people jogging smoothly forward which is not going to happen. And beyond disability just not everyone being as fit and bouncy like the video will slow things down a lot. The speed of a passengers through a particular exit will not be average speed of the passengers but the slowest one out. Also the confusion, trying to get ahead in fear that will surely contribute. There are also likely to be people who are inexperienced flier or haven't thought about how important it is to evacuate orderly or hadn't really listened to the instruction.

For countries like mine where orderly lines or safety drills are not really practiced it will only be worse. I find 5.5 min surprisingly good even if it should be better.

I have a very simple idea that would help: install an electromagnetic lock in the overhead lockers. If emergency lights can work then there's a way to supply electricity to those as well. Noone will grab a bag or anything.

I can see people banging, waiting, pulling, struggling to get them open anyways and blocking even more people from getting out in a real world scenario.