Very poor video but from just a fraction of a second glance, it did look like an FAL. Definitely semi-auto.
The front sight looked a lot like an HK design, but impossible to be sure.
There were three hunters. At the end you see two in front of the cameraman.
People can get semi-autos if needed for special purposes. This looks pretty justified.
http://gunwatch.blogspot.com/2017/08/australian-gun-culture-part-18.html