Thanks, not 100% sure ofcourse, but seemed most logical.
But even if the filming was done by a security guard, it still required a lot of work and smart editing to produce the video with this movie style scenario.
Possibly this video was not made by one person after all, it takes so much work to prepare each scene and shoot all the video.
It would require an entire team like Corridor Crew to make something like this.
I do hope it's not really real, would become a strange world if people start randomly slipping into different timezones.