Saw the video and got excited.
Unfortunately it doesn't work with Upgrade Pack 1. (seems to miss "com.ibm.xsp.extlibx.library")
UP1 I think is what many are rolling out because its a controlled installation and pushed by IBM in an official way.
The release that WebGate says it tested this on: Extension Library 8.5.3.1212012
This release doesn't even exist as far as I can see.