These are some of the presentations I've given that are available online:
Game development in Python tutorial given multiple times - PyCon APAC 2012, US PyCon 2012, 2013 and 2014.
devpi: your one-stop Cheese Shop at PyCon AU 2014.
Don't Do This at PyCon AU 2013.
Web micro-framework battle at PyCon AU 2011.
State of Python at the 2010 PyCon AU and EuroPython conferences (presented as a keynote at EuroPython).
I also speak at the Melbourne Python Users Group sometimes and used to lecture at RMIT University.
The pyglet piņata talk co-presented with Alex Holkner at Linux Conf Au 2008.