This means you can not make a photo/video of a person in public without their consent if they are the focus of your image. They also have the right to revoke consent anytime in the future.
The only exception is at large gatherings like for example the Street Parade where the expectation of privacy can not be expected especially since the event is televised.
This is also why you can not put cameras on your home that film public streets etc. They need to be blocked off or facing the other way.