It took me a while to decide if it was the and eating the spider or the other way around. I'm now pretty sure it was the ant that was the predator and the spider the prey. In any case the ant was walking around with the spider.
Hi Kasiaaus, not sure about the species of Myrmecia but it is a good observation. It doesn't always go the ants way, of course - take a look at https://canberra.naturemapr.org/sightings/4368455. Cheers, Jon