I was sweeping through some old Port Arthur information online and i came across a documentary posted on youtube which has only been there since may 2016 and It is Called Crimes That Shook Australia: Port Arthur Massacre. (It is the Australian version of crimes that shook Britain).
But anyway it is one of the Documentary's on here people seem to like a lot, it walks you through the event in a Dramatized reconstruction similar to Zero Hour and shows Bryants path on the shooting in good detail, i really recommend it for those who have some time on their hands.