Wow, that is a coincidence for sure that you know so many in that video and have a history with that play land.
Those are birds??? At first look I thought them to be dinosaurs but on second look are they Emus with hair?
the grounds are down the road from where i live now, and we spent thousands of hours there as kids.
they are like emus and ostriches. they are called moa [as in, lawn mower] and were hunted to extinction hundreds of years ago. one of a number of native flightless birds, though the moa was the biggest by far. we also have kiwi and kakapo, both very endangered due to pest animals.
mark, the man who made the video, has done a slew of others and is a very talented guy.