That's a great video but its not the fault of security theater, it's just a flaw in the gate design. They made an honest effort to secure the wall but theres a bug in that system. If they see this video, they'll likely patch the fence so people can't climb up again.

Security theater would be more like if they made the gate out of rubber. Then, if someone pointed out that its easy to get through a rubber fence, they'd respond by painting the fence a different color, if they even respond at all.