Figured it out!
Footage of this female humpback whale and calf was taken 26 September 2002
The video footage of the humpback whale female that I recognised in the 2009 National Geographic documentary was taken on 26 September 2002.
This means I can document that this prolific female humpback has had babies in 2002, 2008, 2009, 2012! (Updated 2012 Humpback Whale Calf Count file)
...you wouldn't believe how giddy I am.