Capturing embedded YouTube video on SquareSpace Page

I am attempting to capture a SquareSpace site but am having problems with pages containing media such as embedded YouTube.
I am capturing with for Mac (Ver:0.78)
The page I am mostly having problems with is this one:
When I access the WACZ file the embedded video and image above it do not appear but I know that they are in the file.

The WACZ file can be downloaded from here: Sign in to your account

Many Thanks

William Lowry