Hi,
I'm trying to download a collection of sign language pages, which play MP4s of
sign language words, in the hope that having them stored locally will make the
process of learning them quicker.

The MP4s are downloaded successfully when I start from individual pages with
HHTrack on an internal depth of 4 and external depth of 2. However, when I
start a couple of pages higher, at <http://www.auslan.org.au/dictionary/>, the
MP4s are not downloaded. 

How can I download from that page and retrieve all the MP4s?

God Bless,
Fr Michael.