Extracting assets from Keynote 5.0.3 (iWork 09)

Here hopes this saves you some head-desk-banging when trying to extract images and videos from a keynote.

1) in iWork 09 > Preferences> select "Save New Documents as Packages" checkbox

2) save a copy of your project as an iWork 08 (available checkbox/dropdown in save-as dialogue)

3) in finder, find the file you just created, control-click (right click) and select "Show Package Contents"

Voila.