Pod HD500X - Set Up Wah and Volume Pedal on a Patch

It is possible - hopefully - to set the expression pedal on the HD500 and HD500X, to switch between a volume and a wah pedal. Hopefully the method I demonstrate here will get it done for you. As I understand it, the same procedure applies to 500, the 500X, and the Pod HD and HD Pro Please do let me know if it works ok for you because when I followed the official Line 6 video, it didn't work for me.